I’m a 21m who is 6’3 130lbs. I’m super skinny but I got a strong core and I’m somewhat athletic from all the different sports I played as a kid. I’m struggling to gain to weight (I know I need to eat more) but I also want a good workout routine so I don’t just gain a bunch of fat. Some advice on gaining weight/workout routines would be helpful. I have a thing for pull ups and I have 8lbs and 15 lbs dumbbells. Can’t join a gym currently so I can only do at home workouts. Thanks.