Napping for 3+ hrs

When I started working after graduation I came home feeling so tired. I was never a person that napped but I thought why not.

Now everyday I feel sooooo tired that I can’t do anything properly after work.

However whenever I nap I end up sleeping 3+ hours even though I put an alarm but I just don’t feel rested enough that I end up sleeping more.

I sleep from 12 am and wake up at 6 (even on days where I dont nap)

I don’t drink caffeine because I don’t want to rely on it but everyone says I should start drinking caffeine.

What to do :( ?