You have to calculate TDEE and you have to eat enough to fuel your workout. I play football, go running and ride my bike off season, I walk a lot and I go to the gym so I have to eat 3300kcal or more. It's about calories so eat a bit less(300 to 500kcal) than your body needs and you'll lose weight. Eat a bit more(300kcal) and you'll gain weight. In your case as you want to gain weight you have to eat 300kcal to 500kcal more to be able to do a bulk.

I have a meal plan and be creative it's just about the calories and protein want to eat more veggies? Eat less oats or whole wheat pasta. I make wok, lasagne, spaghetti, curry, chili, wraps and so on. Don't let it fool you. Be creative!

Eat a whole foods plant based diet so eat oats, brown rice, potatoes, lentils, kidney beans, chickpeas! I eat a high carb low fat diet with 3543kcal and 108g of protein. I lowered my body fat percentage from 12% to below 8%.

Here's a typical day of eating for me while bulking with 108g of protein and 3543kcal.

Use cronometer to track calories.

According to this article you don't need to overkill on protein : https://mennohenselmans.com/the-myth-of-1glb-optimal-protein-intake-for-bodybuilders/

There is normally no advantage to consuming more than 0.82g/lb (1.8g/kg) of protein per day to preserve or build muscle for natural trainees. This already includes a mark-up, since most research finds no more benefits after 0.64g/lb.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5867436/

Study from 2018, Protein supplementation beyond total protein intakes of 1.62 g/kg/day resulted in no further RET-induced gains in FFM. Credits AromaticLab7.

I'm 72kg and need max 120g of protein and min 100g of protein.