On the fundamental level, gaining or losing is about knowing ur macro needs and fill them with foods that fits into your lifestyle that is sustainable in a long period
I highlight the word lifestyle because everyone has different lifestyle and diff liking of foods. Once can eat chicken breast all day but one might not
I highlight the word sustainable because it is a marathon, you'll be doing the same practice for the rest of your life.

https://www.iifym.com/iifym-calculator/
http://nutritiondata.self.com/

Success is often about how long and how tough one can sustain a challenge. Gambateh!

Sometimes u need to eat more to continue loosing. Not trolling. True story. That is why sometimes cheat day helps. Sometimes eating at your maintenance after a long deficit helps. But you need to know what you are doing and when you should be doing that.

But if he does not set up his macros with his TDEE, aint IF going to do him more bad? Starve for say since ystd 10pm to the next day 2pm...if it is me I confirm binge if I dont know my tdee.

thanks for ur opinion bro....maybe i might switch to full body next week
as for the calorie intake...did u mean i need to create a calorie deficit?