You have the idea that your body does not handle certain protein sources very well, so you need to avoid them altogether. If you cut meat out of your diet, then your body will have trouble process large amount of beef because you have not provided it with the information it needs to create the enzymes necessary for breaking down a large amount of beef.
Certain foods contain carbohydrates in the form of glucose, fat is the form of triglycerides and protein as an amino acid. Calories are the building blocks of muscle but you should also be aware of each individual macronutrient and have a general idea of how much you’re consuming. If your calorie intake increases, it may develop tougher to consume enough whole foods to meet your goal.
Heard trining persons can absorb a higher level of flexible calories from processed sources due to their high work output but ideally this should only compose 10-15% of their calorie intake. Sleep is one of the most important subjects to improve your muscle group, there is an entire area of research dedicated to just sleep and the effort on body composition and muscle growth. Trainers should be shooting for 8 hours or more every night. You should be able to wake up naturally at the saim time always without the use of an alarm clock.
Muscle is needed times to recover, the most muscle can recover in 48 hours so working them every other day is a good place to start. It does not mean you never work for muscle groups on back to back days as there are routine which do exactly that and folks have amazing results. When it is to arrive your goal, you have to consider that nothing works until you do. You do not reach your goals just hoping and wishing you could be different, you get to the gym and make it happen.