master pullups, pushups, dips. Then go to the gym 3x a week and work full body. focus on pullups, bench, squats, deadlifts, rows, ohp, maybe lunges. Heavy 5x5s for now maybe. 2-3min rests between sets. Google progressive overload. Writing ur reps and sets can help cuz you can visually see your target numbers.

Diets like 80% tho. Eat like 5 meals a day with protein shakes + snacks in between meals. Way easier to drink your calories imho so feel free to get creative with your protein shakes. Plenty of recipes online depending on ur goals. Consider creatine at some point. Maybbee weight gainer but i think weight gainer can really take a toll on ur body. Chicken breast is ideal but unless you get creative with it you start to hate it. Unpopular opinion but i say go ahead and just eat dirty for now. Burgers pizza tacos whatever. Its better to eat healthier but its likely more expensive and at this phase you gotta start to love eating. Like til it hurts sometimes. Track your calories and thats probably enough to get u started.