New person in the bulding game

Hi my name is luke ive always been referred to as lanky luke. im 6ft7 and quite slim! i am looking at getting bigger. I have started going to the gym with my friend who knows what he is doing we go every weekday then sauna after. any tips would help!

I feel like I'm doing the opposite to everyone else here but if anyone else is trying to build their bodies a bit from scrawny then feel free to add me i think encouragement is something that helps all of us it certainly does help me.