Stocking Question

[SombreroBanana]

I've got a 20-gallon long aquarium which I will be setting up for cycling in approximately 3 weeks time (busy month). This is going to be my first aquarium other than a couple of bettas, so I don't want to over-stock. I currently am planning to have these fish:
6 Cardinal Tetras
2 Bolivian Ram Cichlids
3 Kuhli Loaches
2 Otocinclus Catfish
I'm wondering if this is an appropriate stocking, and if not, what you would suggest. I'm new to the hobby, so give me some pointers on what to expect with these kind of fish, and if any of them are hard for a beginner to care for.

 

[Blitz]

Take out the loaches. The kuhli loaches need to be in groups of 6, and 4 inches x 6 is too much for your tank. If you want bottom dwellers I'd get a school of 6 pygmy cories. The otos need to be in groups of at least 3. I'm not too sure about cardinal tetras, how big do they get again?

 

[SombreroBanana]

Take out the loaches. The kuhli loaches need to be in groups of 6, and 4 inches x 6 is too much for your tank. If you want bottom dwellers I'd get a school of 6 pygmy cories. The otos need to be in groups of at least 3. I'm not too sure about cardinal tetras, how big do they get again?

Cardinals usually get around 1-1.5 inches. And would I be able to keep a school of cories along with 2 bolivians, 3 otos, and possibly 6 cardinals?