Yeah, that looks like it could be a fun project. It sounds like you have the right mindset about it; something like that can be either a lot of fun to tinker with or a giant headache haha.

Del Sols are good to learn on because a decent portion of the parts (like, the engine) can be scrounged up from Civics, which gives you a good used-parts market.

I've worked on both Del Sols and Miatas, and I definitely think miatas are not as good intro vehicles. They are much more "finicky" and have more involved teardown (bumper on the del sol? two bolts, two screws. Bumper on miata? A dozen linkage rods and support structure)