7 Month Old Cava terrorizing the house with his behavior

Hi all, having some issues with my male pup of 7 months. For context, our sweet one came home at 12 weeks and was so calm but as he grew it's been very difficult to handle him.

1. Understand all the common commands (sit, lie, up etc) but 95% of the time will only do it when he sees a treat. He seems like a 100% food motivated pup.

2. Doesn't like his playpen, keeps whining or barking to get out of it during rest periods. He does gets his runs and etc in between.

3. Unable to handle him or calm him down, every time we try to pick him up he will run around the house like zoomies thinking we want to put him into the crate or playpen. Will try to bite or nip when we try to brush his coat or blow his fur dry. Going to the vet has been frustrating as he gets all excited and refused to be held down for diagnosis. Does not seem like a lap dog at all haha.

Sleeps in his cage crate at night without problems though. Able to sleep through the night on most days. As we live in a high rise apartment, we potty train him through peepads. So far he knows when he sees one lying around. Accidents are occasional nowadays.

Was thinking of getting some private puppy training. We try all ways to stop him from biting or nipping but without any success.

Anyone has experience with this kind of behavior?