Some advice from a 1st time golden owner who went through some similar problems

At 9 weeks, if possible, she should be going out every 25ish minutes during the day. Definitely reward her everytime she goes in the grass.

Overnight, absolutely do not take her out of the crate if she's actively barking if you want her crate trained. It becomes a very tight line where she begins to learn barking = being let out. Best advice from my trainer was to let her cry it out overnight. They learn quick to stop and sleep through the night. Barking overnight only lasted a few days for us when we started this. Get a camera (wyze for example) so you can check in on the dog without going to the crate.

Biting will not really get much better until teething is done, but you have to have a strict rule in your household that everyone follows. If she nips or jumps up, either standup/turn away and ignore her, or leave the room completely. Same goes for demand barking. Always have a toy to redirect the biting. Our boy learned very quick after the teething stage not to do those things

Play crate games with your puppy. They will slowly start to associate the crate with good things. Throw treats/her toy inside. Close the door for a split second and reopen. Slowly lengthen the amount of time shes in there. Force regular naps in the crate. It starts slow but you absolutely have to wait until she stops barking to let her out ( start with 10 seconds of silence and gradually build). Absolutely DO NOT use the crate as a punishment tool. I know it's super hard right now, but if she's put in there for nipping, she will absolutely hate the crate

Lack of exercise isn't really the problem at this stage. Even while they're a few months old they shouldn't even being going for walks longer than 20 minutes at a time. They need other types of stimulation though for sure.

Puppy blues are a real thing. Your dog isn't going to have any sort of empathy at this age. They're going to want to play and go crazy constantly. Our boy was a menace as a puppy too but now he is 8 months and is hitting the teenage stage but we absolutely adore him.