Simplest way: get exhaustively I-can't-keep-my-eyes-open-tired.
Don't sleep 10 hours every day. Wake up at 6:30am starting tomorrow. Go to sleep when you get tired. Repeat.
It also helps to do things in the real world. If you're spending all your time inside not moving around very much, you'll end up with that annoying situation where it's 2am, you're tired, but you can't fall asleep.
Waking up at 0630 makes sure you'll be almost passing out by 9pm-10pm (please don't drive late if you're waking up super early). The goal is to fall asleep after all. You can obviously adjust as necessary, but may as well go all in if you need to experience real sleep again.
Other things that help waking up early: move nine timezones left in the world.
Don't sleep 10 hours every day. Wake up at 6:30am starting tomorrow. Go to sleep when you get tired. Repeat.
It also helps to do things in the real world. If you're spending all your time inside not moving around very much, you'll end up with that annoying situation where it's 2am, you're tired, but you can't fall asleep.