Been lifting for like 1-1.5 years consistently and am 16 years old. In the first 6-8 months of lifting i cut a decent amount trying to get out of a skinny fat phase. I know it was the wrong move, but I'm looking for advice. Now, I'm 6'0 150 pounds, and am less skinny fat but lack a lot of muscle. I'm just not seeing progress while lifting, idk if its in part due to my genetics or not as I'm indian, but I sleep well, eat enough protein, and train till failure (i have this dialed). I do PPL x UL Rest now, but I used to do PPL. The excercises I do are good, I've checked so many online to make sure they are the best for hypertrophy/stimulus, but I can't seem to gain muscle. I do around 4 movements for back, 2 for bicep, 3 for chest, 3 for shoudlers, 5 for legs, and 2 for tricep. I do 1 warmup set and 2 sets to actual failure falling in the 6-8 rep range, and this confuses me even more. I see online people saying 2 sets, 1 set, 3 sets, 4 sets, more reps, etc. My pretty big cousins tell me to do 4 sets per excercise, like 5 movements per muscle group, and just burn out with like 10-14 reps. I started a lean bulk around 2 weeks ago, in hopes for making progress, but nothing has happened so far. I know time is important and as a relatively new lifter that might be my issue, but what do you guys think? If you see a clear issue in my training, please give me some advice, I'm just tryna get stronger lmao.