I’m tired all the time. No known health issues. Help!

My blood and vitamins are fine. No health issues discovered yet. I sleep 6-10 hrs a day. I do a 15m walk on weekdays before work. I drink about 50oz of water a day. I live a relatively sedentary and quiet life.

Yet, I’m always too tired. This prevents me from performing my hobbies. I can basically only work and that’s it

I have spent many years alone and isolated. I want to start going out to the bookstore for example. But I’m seriously tired all the time.

Please share any strategies you have! I have never felt “energized” but i need to have more energy in order to do things that make me happy!!