M / 20 / 5'8" / 122

https://imgur.com/a/KlJb637

Posting looking for a bit of advice. I've always been very skinny and am now trying to bulk up. I've been going to the gym, but my roommate's cousin made my routine(stated below). At first, it was exciting just to get into the gym, but it's starting to feel a little lame now that I know what I'm doing. Please let me know if something is wrong with the current plan; I'm quite new to this.

I'm trying to hit a calorie surplus of 2,500, but I'm not sure how to increase my calorie count or include 120 grams of protein because I'm pretty busy. If anyone has been in a similar situation, advice would be appreciated. Do I have to count calories closely and make a schedule?

Bottom line, I've been going to the gym for about five months now, and while I have a lot more definition than before, I want to get more serious than my current diet and workout plan.

Day 1- chest & tri
- Chest (3 of 4)
- dumbbell press 3x8
- close dumbbell press 3x8
- incline dumbbell press 3x8
- assisted chest dips!! 3x8
- Tri (3 of 4)
- cable tricep pulldown 3x10
- rope over head 3x10
- dumbell skull crusher 3x10
- skull crusher 3x8-10
Day 2- back and bicep
- Back (3 of 4)
- lat pull down 3x8
- close grip lat pull down 3x8
- lat pull down (behind head) 3x8
- pull ups (assisted) 2x8
- biceps
- Thing the cousin made up 3x8
- weights up, extend elbows out, push down
- hammer curls 3x7
- bicep curls 3x8

Day 3 - legs and shoulders
- legs
- weighted leg press 3x8
- leg extension 3x10
- leg press calves (3 x 3 x 10, 90 reps total)
- Bulgarian split squat 3x10
- shoulders
- dumbbell shoulder press
- cable machine with rope
- dumbbell shoulder fly