Hi Janosh, welcome to the board!
Great to hear you like it mate.
If you want to get bigger and stronger, you have come to the right place
To eat enough to bulk up is often a lot of food - and imagine, as you grow bigger, the demand increases accordingly, so when 3000 calories may be enough to put on weight, at some point you may need 4000 just to maintain!
What were the health things for avoiding dairy if you don't mind me asking?