in the process of starting my first tank

so I'm setting up a 1.5g tank( the kits they "say" are for bettas).

my plan is to have it lightly planted either a few shrimp and snail snd that's all( unless you think there's a fish that would actually like it in such a small tank)

I'm setting this up as a sort of practice/ learning ank as I haven't had one since I was a kid in the 90s.

that being said I know I should wait a week after setting up/planting yhe tank yo let it stabilize stabilize. my question is should I add shrimp or snails first or can I do both at the same time safely?

also any advice for someone basically starting from scratch?( I know a 5g or more is a better tank but I was gifted the 1.5g so I want to learn while I save for a bigger one)

please and ty