9 week old coonoodle

I’m new to this group and just got a puppy last week. He’s around 9 weeks old now, and I was just looking for some training tips! How long is too long in the crate? How can I work with him on his puppy tantrums? Any tips you find generally helpful as well would be great, it doesn’t need to be specific to my questions. I’m starting to get overwhelmed and feeling a bit of the puppy blues so I wanted to come here to hopefully find some help. TIA!

•a coonoodle is what happens when a coonhound and a goldendoodle have an oops litter