First of all, welcome!
A few tricks to sauteing meat - the fat in the pan has to be hot before you put the meat in. Hot enough so that you can't bring your hand more than 5 inches from the surface of the pan. You also need to pat the meat dry with a paper towel before you put it in, or else it'll splatter (which is never fun) and the water will just make it steam instead of brown.
It takes a bit of trial and error to figure out how to cook meat to your liking, just like anything else. Good luck on your new culinary adventure!