Stock my tank!

Starting this 20 gallon long. Water ph is probably 7.6-7.8. I want to keep neocaridinas in here and keep the temperature 75 degrees or lower. I’m fine with fish eating some of the baby shrimp but I want to maintain a decent size colony. So, what else would you put in here? I’m not using a lid right now but I do have a custom lid if needed.

Ignore the water level, it will be full ha.