puppy training struggles

Hi! I have a basset puppy who is 8 weeks old now. I’ve had him for about a week and it has been a struggle. I love him to death but it has been hard.

Potty training and separation anxiety have been the hardest. I know he’s young so I don’t mind the accidents because he usually does go on the grass, the accidents usually happen if i’m doing something and not paying attention. Sometimes he’ll stand by the door and sometimes he doesn’t.

The separation anxiety is BAD! I cannot do anything without him crying soooooo loud. If i’m not touching him, playing with him, following him, or next to him, he cries like he’s been hurt badly. At night, we put him in a crate, and he will cry for like a hour before finally calming. During the day I try doing positive crate reinforcement, if he goes in the crate willingly and calmly he gets treats and praise, i never use the crate as punishment. Only when it’s bed time or I desperately need to get something done in the house without worrying if he’s getting into something. I just don’t know what to do to help his anxiety. Nothing I do helps, and once again I know he’s a baby, so he probably can’t help it, i’m just lost and don’t know what to do. Any advice appreciated

Edit: I want to add that currently I cannot take him on walks, I live in an apartment complex with lots of pets, and he does not have all his shots. I have a giant piece of real grass on our balcony! I just need the loud crying to tone down a bit, I don’t want to piss the neighbors off😆 At least the worst of it is during the day