...people born in 1995 are 16? Damn I'm old.
Dude, go look up starting strength and go from there. Learn to deadlift, squat, overhead press and bench press properly. Just training upper body 4 days a week is gonna make you imbalanced. You need something basic with plenty of compound lifts performed frequently so you can learn their technique.
Progress will be dictated by your diet and your recovery modalities. I.e. don't eat enough, or not enough of the right thing and you won't gain. Don't get enough sleep, you'll hinder gains.
Reiterating what Resolve has said, a lot of your gains will come with not just proper training but with a proper diet. Make sure to eat a lot of (animal) protein and take in at least 3000 calories/day. After a month if you think you're getting fat, scale the calories down. If you're not putting on muscle like a monster, eat more.
In terms of training, once you're comfortable with the mechanics of the squat, deadlift, and bench press, your exercise routine should really center around those three movements: squatting, deadlifting, and bench pressing; along with pullups and overhead pressing/shoulder/military pressing. All other movements are to assist you in getting better at the main movements and should be considered secondary to squatting, deadlifting, benching, doing pullups, and shoulder pressing. If your program emphasizes these movements, just stick with it for a while and make sure to eat properly.
Eventually you may like to look up starting strength, or one of the 5x5 programs (some here like Stronglifts 5x5, I've always heard Bill Starr's 5x5 is a good, too) to continue your gains.
