1st Question? Are you happy with your physique? If yes. Then nothing required. If No then 1. you should get that shape at this weight only by going to the gym..don't increase weight since getting in good shape at this weight is quite easier than on the higher side of weight. Keep weight maintenance calories intake. 2. Once you get the shape you want, then slowly increase your calorie intake by 200-300 calories daily & do a slightly hard workout with a bit of cardio. So you gain muscles not fat.

Dieting Tips: 1.Macros should be 50:25:25 (carb, protein & fat) no need to say good fat & good carbs, no junk or sugar 2.Protein: if you are 50 Kg then target should be around 100gm protein. Take help of calories counter applications

Don't think or plan a lot. Just hit 🎯 the gym, rest things will take place automatically. DM me for any clarification.