What will my BYB puppy miss out on?

hello! Thankyou all for answering all my questions! well i geusse i'm sort of convinced that a got a BYB pup. so my fam and i are doing every thing to raise it proberly. h ws baught 2 week early so i want to know wht he will miss out on? oh and we have another pup that he plays with. oh he is a healthy six week old german shepherd mix. Thankyou! and please try not to be mean and give helpgul advice! thankyou!