There's quite number of musicals too xDD Any storyline in Sailor Moon you really, really like? It might be a good idea to start with your favorite story.

....That's a lot.

That's really up to you because most of them do not have anything to do with the others. The only thing that you should watch chronologically is the Dracul Saga (all musicals with Miyuki Kanbe as Moon), because those all tell a coherent story.
The other ones usually stand alone (with lose ties between Stars and Eien Densetsu and Black Lady and Ai no Sanctuary).
My first one was Ai no Sanctuary, which was pretty neat.
My favorite ones are Ankoku no Princess Black Lady and Shin Kaguya Shima Densetsu, but the original Kaguya Shima Densetsu, Yume Senshi~ Ai Eien ni~, Sailor Stars, Eien Densetsu and Mugen Gakuen are also great. The Dracul Saga too, but I think it's a bit too long and complex for just checking it out.

I only saw La Reconquista, so no.
Which should I see first?

That's great. I'm currently re-watching PGSM myself, with the new subs from SeaofSerenity. Have you ever seen the musicals? Those are great too, the older ones have lots and lots of toku actors

I like it a lot... lol

That's great to hear. PGSM was my first ever Japanese toku and my introduction to Sailor Moon, so I'm always super-happy when other people like it too!

....3. >.<
I'm loving it,

Ohhh, PGSM! Which episode are you at? How do you like it so far?

I've been watching PGSM and Steven Universe.... :P