I am physically not too skinny and not fat. I want to become bigger. I could just read about it online but since you seem to have knowledge on this kind of area, do you have suggestions?
If your primary goal is bulking up and you don't have a problem with getting fat then a standard gym routine would probably be the way to go. I would train with whole body workouts three times a week doing all the main compound lifts to start with. Eat a high calorie, high protein diet. I could go into more detail if need be. Later when you know what you are doing and assuming you are fully grown you could try sarms/steroids if you want.
You don't take anyone's heartfelt, helpful advice, yet you give out half-assed or downright dangerous advice. That's how you become a fitness guru overnight.