How to fill my weight gain diet quota

All of the things you eat will contain a combination of protein, fats and carbs - very few things are only one.

Getting all of your protein from supplements is not necessary - surely you eat foods containing protein? Meat, eggs, seafood, dairy, beans/legumes, grains, tofu, seitan, tempeh contain protein, even nuts and vegies contain protein. Are you saying you eat none of those things?

Fats are in avo and nuts, they're also in oils, seeds, nut butters, meat, seafood, dairy products, coconut.

Carbs... Vegies, fruit, grains, beans, legumes, sugar/sweeteners etc.

Try logging your food, double check database entries for accuracy - either against a food label or with a reputable website for non packaged foods. You'll see that these things add up over the day - just log your normal intake first and then see how you can change food choices and quantities to better suit your goals.

To gain weight, it's the total calorie intake that matters. You need to be in a surplus - not too much, or you'll just put on fat... And follow a progressive lifting program at the same time so your gains will be at least some muscle mass

Carbs - try to get most of your carbs from whole plant based foods such as potatoes (sweet, russet, hash browns), rice, and fruits (I eat a ton of fruit, and you will need it to help move things along in your digestive track when you are eating that much food). minimize breads and pastas

Fats - avocados, peanut butter, nuts, seeds, red meat, try to stay away from oils and butters as much as possible

Protein - lean meats like chicken, turkey, fish, shrimp, eggs, some red meat.

At the end of the day, I recommend staying away from all dairy and oils, they have more negative effects on the body than positive.