Australian shepherd never calms down?

Help needed!
I have a 11 month old Australian shepherd. I knew he would be a lot of work and I’m home all the time so I thought I could handle him. But I do 6 hours of exercise and play a day as well as 2 hours of training and he’s still a crazy dog. Won’t listen bc he’s too busy either sniffing non stop when we aren’t training or outside running around and going for runs. It’s impossible for him to just calm down. He won’t go to sleep till like 3am and is up at 6am ready to go. I’m exhausted I really need help. How do I calm with dog 8 hours he is getting mental and physical and it’s been almost 8 months of only 3 hours of sleep a night. I can’t keep going on like this.
Australian shepherd never calms down?
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