Needing advice!

I’m planning a small, intimate beach ceremony with immediate family, grandmas/grandpas and some close friends, followed by a larger casual backyard celebration a few months later for extended family and plus-ones. (There are a-lot of reasons why we chose to do this).

Since we’re skipping a lot of traditional elements, I’m unsure how best to handle the invites:
•⁠For celebration-only guests, I’m thinking of sending an invite + RSVP via a website link—no save-the-dates, just to send after the ceremony. I’m keeping it casual. Wanting to include an FAQ and leave out a registry.
•⁠For ceremony guests who will also attend the celebration, I’m thinking of creating separate digital PDFs with slightly different wording (for both ceremony and celebration) so I can send something cute to everyone (who aren’t parents) instead of just a plain text or email. I’m thinking they can just RSVP directly to me.
Just to add, not a-lot of people (whom are out of the state) are traveling far at all as some are in California or other parts in Nevada which is where we are having the celebration.
Does this approach make sense, or is there a better way to handle the invitations and RSVPs for both groups? I know how to word things, but perhaps I’m overthinking the logistics. I’m trying to make this simple as possible. Thank you.