The good news is, I don't really think you require great micro for COH2 to be decent, positioning and strategic decisions are a good leveler in Coh2.
Saying that, Micro like any skill, is about learning good habits and repetition.
Some good tips already given, so i'll just add that learning build orders and capping orders will alleviate some of your efforts on that front, allowing you to concentrate more on your micro.
In terms of factions, I think Ostheer is a good one for learning the game. Positioning is very important for Ostheer, and they require a decent amount of micro, but not an excessive amount imo, compared to USF for example.
