Hi, Muserale,
Thank you for visiting the Apple Support Communities. We understand your Apple Watch is stuck in Power Reserve. You've come to the right place to get some help!
It sounds like you've already tried removing the watch from Power Reserve following the instructions in Check your battery and charge your Apple Watch - Apple Support.
To troubleshoot the issue further, please follow the steps in If your Apple Watch won't charge or it won't turn on - Apple Support next, starting with the recommendation to keep the watch on the charger, and then try force restarting it: Restart your Apple Watch - Apple Support.
Should you still not be able to get the watch to restart and power on, please get in touch with Apple Support directly: ;.
Have a wonderful day.