I’m 5"11 and 157.
Same age as you, and bulking up won’t do anything for you, all you need is water, correct nutrition, protein to help repair those torn muscles.
Free weights are nice, if you want to bulk its sets with 5 reps. and to get lean muscles its 10 reps. in each set, at least thats what I’ve been told and follow.
Gymnast exercises always help me a lot, dips are great, of course variations of push ups, diamonds, wide, bicep, hands close to waist, hands above head push ups
these prove easy to do anywhere and help.
To work the chest along with you benching routine, do flies, dumbbell presses.
To work the core, v-sits, l-sits (difficult for beginner) crunches, side crunches, leg lifts.
Never pass up on your cardio, it is very important.
Setting up a workout plan is also very good and a helpful way to set goals, and record your current standings.
Watch some of his videos he has lots of good workouts and ideas, many of his workouts I use and add some twists and variations, they prove to work really well and help a lot.
Hopefully I helped, I am young but advise is advise, as long as you take it in and learn from it.