Good morning, “total noob”—NOT.
I can give you a few suggestions that may help in the beginning, and for the rest I would say you should find a good pitching coach who will work with you and teach you some of the things you need to know. The first thing—you obviously need to work on control, and here’s a drill—actually more than a drill, it’s a good workout and a lot of fun besides. This is something I used to do when I was a little snip, twelve years old or so, and I continued to do it from time to time through the years when I was pitching. First, get a good catcher. Then, if you can work off a mound, do it, or if not, mark off a pitcher’s rubber and a home plate 60’6’'apart. It’s a little game called “ball and strike”, and the purpose of this is to sharpen up one’s control. The catcher positions his mitt in various spots, high, low, inside, outside, wherever, and what you have to do is get the ball into the pocket of the mitt—believe me, there are few more satisfying things than the “thwack” of the ball as it goes smack dab into the pocket of the mitt. I remember how we used to go at it for an hour at a time!
Next, you should think about your arm angle. What type of delivery is most comfortable for you—overhand, high or low three-quarters, sidearm or even submarine (there are a few pitchers who use that delivery). Or maybe don’t even think about it. Just throw the ball and see what feels most natural for you, and once you have found it (to paraphrase the words of a song), never let it go. I have heard about too many coaches who for one reason or another try to change a pitcher’s natural motion, usually because they have an agenda or something, and it ends up not only not working but also giving the pitcher a sore arm or a sore elbow or whatever. I remember when I discovered, at the age of 11, that I was a natural sidearmer, and I stuck with it, and I found a most incredible pitching coach (an active major-league pitcher) who showed me how to make the most of my natural motion.
Then, consider your repertoire—your stuff, as it were—and it’s not too early to start thinking about it. My guess is you have a pretty good fast ball—you just need to get control and command of it. And you might think about a few breaking pitches—and there are more of them available than one realizes: curve ball, slider, various forms of changeup, you name it: I had a good curve ball that came attached to my sidearm delivery, and I worked with it and learned to change speeds on it, and I also picked up a palm ball and a knuckle-curve. My best pitch was a sharp-breaking slider which I nicknamed “Filthy McNasty” (after a character in a W.C. Fields movie) because that was exactly what it was. You say you’re 22, and that is not too young to think about adding a couple of these pitches to your arsenal once you have your control squared away.
But probably the most important thing is to get those mechanics, and for this nothing beats a good pitching coach who knows what he’s doing and can help you. There’s probably someone, perhaps more than one, in your area—ask around. Good luck to you. 8)