You're going to need another otto or two they like to be in groups. Didn't someone mention about not adding a shrimp with bettas and adding the same species of cories? I think you need to slow down and bring back everything you were told and then add the other fish you need like the ottos and more cories and female bettas, Then decide what to get after. I think someone mentioned that too. You are ignoring some peoples good advice! Good Luck 
its ok bettamomma!! you know how hard it is when you're new... i imagine most the people on here only joined after they had already (mis-)stocked their tank. i know i never did any research to speak of before i bought my 60g. of course not listening to advice is a different issue... yet somehow that one always seems to be self-rectifying...