Im in the same boat as you are and after a lot of readings, main thing is to keep the water condition right to keep them happy.
0 amonia and nitrite with minimal nitrate.
Acidic and Soft water is the preference with 21-25c temp... but must keep parameters as stable as possible as sudden changes can kill them
Make sure you have some places for them to hide too... dont keep with fish if you want to breed them... (Ottas are considered ok though)
dont overfeed them, as they can get what they eat if you have some plants or drift wood in the tank... otherwise, occasional boiled spinanch, zukinis, algae disc, and other food can be added... but any left overs after a few hours or overnight should be removed.
apparently they will breed if they are happy and healthy
but if this is too much efford, then red Cherry shrimps might be an option as they are more robust, and will breed very easily...