Newbie Question

I haven't finished a season yet. Getting close on a few of them but not doing very well. Have a question on pitching and hitting. I'll give a couple of scenarios. If you have a right handed pitcher who is R2 what type of hitters should I be looking at to face that pitcher? Along the same lines if my opponent has hitters who are R1 through R4 what type of pitcher should I be throwing agaisnt them? I know there must be a number of different factors that goes into making that decision. However, I'm just wondering what basic advice you would give to a person just starting out on how to select the hitters and pitchers.
Thanks