Starting off by doing compound exercises like squats, deadlifts, bench press, and OH press is a great way to get your base strength levels up. You can add accessories later to zero in on specific muscle groups that need work. (You'll know which ones need work.)
Best tip is don't be a showoff. Use only the amount of weight you can actually handle while keeping your form correct. Proper technique is better than big numbers. Strength will come with effort and technique.
Oh, and your diet will change. Get ready to sate those cravings you'll get for protein-rich and fatty foods your body needs to repair your broken-down muscles. And get used to delayed-onset muscle soreness (DOMS); it's the "pain" in "no pain, no gain". Other forms of pain may not be so good.