Also take into consideration on what type of maintenance you want to do. I'm lazy so I chose tough things to put in my tank.
I have harlequin rasporas and albino corydoras, because they are both really hardy fish. I only clean my tank once every 6 months and sometimes I forget to feed them. I've had albino corydoras that lived over 5 years.
I also have a piece of driftwood with cryptocoryne plants growing off it. Cryptocorynes are very low maintenance plants, they will survive with whatever light you give them. Also good for oxygen
