Hi Jen, welcome to BLW. How old is your LO?
The best foods I found were broccoli, potatos, cauliflower something that crumbles easily when they put it in their mouth. Broccoli needs cooking to the point where you can just pull the green bits off, cut them into chunks your LO can pick up.
If you're worried about choking sit him in your lap for the first few meals, if anything to reassure you that you can help him if he needs it. Just have a cloth or two handy to clean up when he's done.
Be prepared that they gag a lot in the early days and generally make a meal out of it, they're only truly choking if they're not making any noise at all.
Other food you can try is strips of tomato, cucumber, very ripe pears, banana and so on.
I hope that helps?
BLW is fun, but dam messy