I like endlers as well, just don't mix with guppies as they will interbreed. Chilli endlers are a hybrid, but are very colorful.
Get a good supply of java moss some endlers and your choice of shrimp, I like the Sakura fire shrimp but there are alot of different types out there. I have some blue shrimp that are pretty neat!
Nerite snails are cool, but not really needed for this set up, I have the same tank and have no problem with algae build up, plus nerites won't reproduce in fresh water so you will have to continue to purchase them when they die off.
You could put a smaller piece of driftwood in there and get a smaller type of bushy nose pleco/ancistrus variety.
I use no substrate in this setup, since it's a smaller tank with alot going on in it, I try to keep the cleaning to a minimum.
Water changes every 1-2 weeks and pretty much all is good. But ymmv
Gl
Daniel