itchy

first, it really depends on the shrimp types.
for difficulty level, i would rank
CRS>YAMATO>TIGER>CHERRY>MALAYAN

for my Malayan shrimp, they seems to live and survive in most of the condition. some of them live in my 1.5feet tank without fan. some of them live in another 1.5footer with only a air bubble filter. all this are planted tank of coz.

some live in more uncomfortable condtion... . in a jar, in a plastic tub (without fan, without filter, without light tube, only natural light)... only moss in there. and the funniest case is, only the jar one breed before... i never got any shrimplet in tank... but i believe is due to the fishes...

for cherry shrimp case, they are quite similar to malayan shrimp. but still do what should be done with a new tank... cycle the tank, grow lots of moss like what DOM suggest... also put a fan and keep the temp below 28degree. you should be fine keeping cherry and yamato. i hv no experty in CRS tough...

good lucks and have fun in this hobby!