I would say do you research as far a what monitors require what space, It would take a lot of typing to go through the list. just find a list of monitors and go through the dwarfs.
As far as breeding I would really worry about care first. Im sure you know how to do temps and humidity if youve done other reptles, but monitors are a whole different story. They arent like leos and beardies where you can just put them together, get eggs, and incubate them at roughly the right temps.
There is a ton of info on the interned and a lot of good stuff on this forum. I would suggest read, read, then read some more.