You have to concentrate on the core exercises; their importance for building muscle and strength and mass in this order:
Squats, dead lifts, bench press, and shoulder press.
Squats can even help with upper body mass and strength.
Super squats, doing 20 reps at a weight where the last 2 or 3 reps are almost unbearable, really gets the bodies testosterone and other muscle growth hormones moving into high gear.
If you want to do it the faster way, but it is unhealthier, eat a lot of animal protein.
I you want to do it in a healthier way, but it will take more time, and you may not get as strong, but you will still be plenty strong, eat less, or no, animal protein, and eat more plant protein.