keeping track of your protein, fat, carb intake will help, you dont have to be super anal about it, you can eat intuitively like you have been, but just making sure you are getting enough protein (.75 grams per bodyweight) and healthy fats is a good focus, and just eat carbs around your workout times, or times you are more active. once week on all bodyparts is a good starting point, 8-15 reps on most stuff with 3-4 sets. shorter rest times, 60-90 seconds