OK, I was getting curious since the first page.
If you still don't have much experience. I'll still suggest going back to the inhabitants of your original post.
I've never kept rams myself. But most of what I've read, and even still in this thread. They take some good care, mainly in the "keeping a stable environment" area.
As for your original post...
I'd go with somewhere around 6-8 cories. All of the same type.
And however many guppy's(?). I kept 4 one time in a heavily planted 30g and they seemed to fight constantly. (my only experience with them).
Could keep anywhere from 3-6. And plan on feeding them. Because 3 will have the place cleaned up with in the first month. And a nicely balanced planted tank won't have much for them to eat.
The problem with this. Is that the cory's will do a disappearing act with the algae waffer's, before the oto's know anything was any there.