With the MVP if you go RDA get ones with single coil airflow options so you can try different builds.
There are many decent clones out there - check out some review videos on YouTube. Magma, Trident, and Patriot would be some of my suggestions to start with.
After you get used to build on an RDA, I'd say pick up a Kayfun (Eh Pro has some decent quality clones). Kayfun takes a bit to get wicking right, but after a few builds you should be good. Watch some Kayfun Build videos and try to replicate from there.
hth