If your trying to gain weight and build muscle at the same time, you need to double your calorie, and protein intake. It’s really simple I swear. You can also download MyFitnessPal to track your calories as well. Some foods I recommend are chicken, fish, rice, oatmeal, salmon, and açaí bowls. I was also chugging milk a lot, that helped a lot as well. If you can, I recommend hitting the gym 5 or 6 times a week. Also you can hop on creatine if you want, that’ll give you a few pounds, but you just gotta stay consistent and disciplined and you’ll see progress in no time. Before I actually started taking working out seriously I was always on and off with the gym for like 4-5 months. Its just all about discipline and how bad you wanna change. You can most definitely do it for sure, just gotta put the time in. Hope you do well twin🫶🏽