Nutrition does not have to be complicated to work. The single most important thing we tell members is this: eat enough protein. Aim for 1.6 to 2.2 grams of protein per kilogram of bodyweight each day. For a 75 kg person that is roughly 120 to 165 grams. This supports muscle repair and strength gains, which is exactly what your body needs when you are training calisthenics consistently.
One mistake we see a lot is people cutting calories too aggressively while also trying to build strength. These two goals conflict with each other. If your main goal right now is to get stronger and develop skills like pull-ups or handstands, you need to be eating enough to fuel those sessions. A large caloric deficit will stall your progress and leave you feeling drained. If fat loss is also a goal, a moderate deficit of around 300 to 500 calories per day is the sweet spot.
For food choices, we keep it simple: lean meats, eggs, fish, dairy, legumes, rice, oats, vegetables, and fruit. You do not need a special diet or expensive supplements. Whole foods eaten consistently will take you further than any extreme protocol.
Avoid crash diets, very low carb approaches, or anything that leaves you constantly hungry and low on energy. Calisthenics training is demanding and your fuel matters. Eat well, train hard, and be consistent.