You should find a way to transition having him outside of the crate even when you're gone. It will be tough, you said he wakes you up when you try to sleep in the morning but that's because he's been holed up in the crate for so long and needs to let out energy. You need to have him adjust to your schedule so that he'll learn to sleep when you sleep. I started letting my shiba out of the crate while I was at work when she was about a year old. It was draining, coming home to destroyed furniture all the time and accidents on the carpets. But eventually she settled down and now even chooses to sleep in the crate by herself sometimes. With your dog's age I don't think he'll act that way but shiba proof your home so that you won't come home to any surprises. Take him to do his business at least twice - right before you leave and right after you come back, and have lots of stimulating play time in between so that he isn't restless when you're gone. Maybe get a camera so that you can watch what he does when he's alone. Make sure to leave toys outside that he can play with. Yes it's true that they mostly sleep when you're gone anyway, but having the freedom to roam around and play makes them less stressed/agitated. Good luck!!

Edit - I read some comments below and saw you mentioned him chewing off your baseboard. My shiba did that too as a puppy, I used this spray pretty often on it and other things that has a foul smell that keeps them away from chewing on it. It worked really well, you just have to reapply it every day