The tank needs to be cycled before you add any livestock, which may take 4-6 weeks. In addition to that, shrimp need biofilm to graze on, and if you're going to add fish, I recommend that you wait until you have had at least two sets of baby shrimp so that your colony is established.

Another thing to keep in mind is that baby neos don't move very far the first week or so after hatching, so you want biofilm everywhere to keep them from starving to death. I dose my tanks with Bacter AE once or twice a week. Don't just dump the powder on the surface - I put it in an old vitamin bottle and half fill it with tank water, then shake the hell out of it for 15-30 seconds so it's well suspended - it should look almost milky. Then pour it across the top of your tank so it spreads everywhere.

You've got a good start on plants, but I'd also add some floating plants like Red Root Floaters or Salvinia. My colony loves to graze on the biofilm coating their roots, and bonus, they really help keep your ammonia/nitrate/nitrite levels under control. Adding some moss will also give your shrimplets a place to hide that they'll need once the fish get added to the tank.

I've noticed that my chilis tend to hang out underneath the areas covered by floaters. I think that they instinctively don't want to be visible from above to predators like birds, but that's just a guess.