Amazon wedding dresses

So ive been kinda browsing and lurking about on the internet to do some research on more affordable wedding dresses.
Im a size 24 so findibg larger dress sizes is very difficult tho i am trying to lose a large amount of weight before my wedding i know im still going to be a bigger girl.
Anyways, my first plan was david bridal as they have a larger selection of plus sized dresses and they all looked very affordable but then i found out that the tailoring thru them was outrageous and often twice as much as the dress you bought.

Then i saw a woman on youtube trying on different wedding gowns like places from wish and amazon etc. I would never use wish because of sizing issues but amazon seems to have quite a bit of a selection for very reasonable prices and in larger sizes.

Long story short, has anyone had experience ordering wedding/formal clothes online or from amazon? Ive never ever ordered clothes from amazon and am worried about spending the money and not being able to send it back and being scammed out of said money.