Welcome! to cooking and to ChefTalk!!
Pork loin, eh? If it's conventional pork and you want to roast it, it's going to need help with moisture, since it won't have enough fat to keep it moist in the cooking. Do a search here on "brining" and you'll get some suggestions for how to add flavor and moisture. Just a couple of hours in a brine should be enough. Then you can roast it or braise it --
Epicurious.com has 93 recipes for pork loin. (There are tons of recipe sites, but
epicurious.com is one of the most trustworthy.)
Have a look around ChefTalk -- you'll find recommendations on cookbooks for people just like you, who are new to the game

and I do mean game because cooking is the most fun I know, after maybe playing with the kids!