Should I go ahead and start planning?

Girl, you have already started. The first thing you do is decide on a budget and guest list, then get your venue and date. Make sure you've figured your budget before you actually book it, but book the venue you want ASAP to lock in a date. Then start contacting Photographers an DJs because the good ones book way in advance.

ETA: I agree with @Monica but really want to emphasize DO NOT ASK your bridal party yet, and know that your guest list will change because relationships change in that much time.

If you're bored and won't have time later, then yes, but you may also change your mind so don't be mad at yourself if you do it now, just stick with it. I would tip that you not ask BMs yet or promise invitations yet, your guest list and friends will change dramatically in 2 years. Probably wait on your dress too other than going just for fun to see if you like A-line, trumpet, mermaid, or sheath styles, never know if you'll gain weight.

Oh yes I agree with WooPigSooie too, book DJ and photographer now you can get way better prices a year or so in advance and it took me forever to decide on a photographer so you do have that to your advantage! There's so many styles and types of photographers so you have lots of time to do your research

We are planning on marrying in June 2019 and even though we are not DIY we have already narrowed it down to 2 possible venues and will be booking within the year. As far as decorations I have heard of DIY brides getting stuff early but then seeing new stuff come out within the year of them planning and wishing they waited. Honestly I would start a book, or even a Pinterest board on all the possible DIY decorations you are thinking of.

Start small, get small decorations nothing major just yet, with my first wedding I knew I wanted to have candles on top of mirrors so I start early buying little candles here and there, ordering colored marbles to put into vases. I didn't want to get anything huge like hanging decorations that I knew could change as I went along with planning.

Ultimately it is up to you. Love your theme by the way!

Definitely work out your budget now and start talking about your guest list. I think it's fine to start on a few DIYs now, but I wouldn't go overboard with knocking them out completely now, because your vision may change as time goes on. I went from a veeerrrrry complex design for my centerpieces to something very simple that I actually loved so much more, but if I had done my original DIY idea at 20+months before the wedding, I would have been stuck with those or have to figure out another way to use them, or face the realization that I had wasted time/money. Researching and booking vendors is probably the best thing to focus on now.

We are building these, we already have old door that my grandparents have collected over there years

Like PP have said, after you've decided on your budget then definitely look into and book all your vendors right away. As for anything DIY, if you have room to store the finished products without them getting ruined I would start some things now if you want. However, I wouldn't get too crazy as there are some things that will get ruined easily or you will not have room for. I am DIY'ing some signs for mine with old wooden windows, but I haven't even started them because I am afraid of the chalk paint falling off or chipping.

@Monica, based on the other post I think she already picked her BP.

I agree with PP, get the DJ and photog now because prices can increase and at least you are locked into 2017 or 2018 rates.

It's nice to take your time and enjoy the planning if you get an earlier start on it. I'd say book your vendors as soon as you've decided they are the right fit for your day and take your time planning and DIYing your decor as you go! Best wishes!

We're getting married in April of 2019, and I've started. We are both the kind of people that know what we want and seldom change our minds once we decide. When we booked the venue the coordinator there said two other couples came in looking for our date as well. I would get started with booking at least the venue and caterer. If you don't think you'll change your mind, I'd start with the DIYs too just so you're not stressing

Also, be careful doing a lot of DIY before booking a venue. Our venue does not allow any outdoor decor (all decor including flowers they do in house through a design house). So you don't want to buy or make a whole bunch of stuff and the then figure out you can't use it.

I agree with the above comments... start booking things now that way that stuff is taken care off and crossed off the list. As for the dyi stuff do it here and there its never too early lol

Agree with previous posters. We booked our venue over 1.5 years out (in Nov'16 for May'18) and they already had 20 other dates for 2018 booked. We had photographer, videographer, DJ done just under 1.5 years out and we started saving ideas for DIY, flowers, attire, etc immediately.

Sooner the better. Planning it out reduces stress when it gets closer.

Start right away. This gives you time to really research your vendors of preference and make sure they are available. Also, gives you plenty of time to research your favorite DIY projects and finding the best deals on materials (especially holiday or past season sales). Definitely lock in the venue, then move onto your dress, photographer, DJ and flowers (all within 18-12 months prior). Wish you the best!

On the DIY would recommend waiting till closer to your wedding date. Burlap, blush pink, and lace, trend wise, are going out of style, so your view of them may be different a year from now. Unless you have a ridiculously busy schedule, you should be able to knock out the decorative DIY like centerpieces in the last 6 mths of your engagement.