I feel bad about myself
It is clear to me that you since you have issues with this yourself, that will hold you back more than anything external. You have to embrace who you are no matter what. No one gets to choose exactly who they are 100%. If we did we would all be Brad Pitts or Dan Bilzerians.
Advice is to embrace the baldness, and NEVER hide it. I am 30, and my best friend is 31 and he is completely bald. It's just genetics. I don't think bald signifies age really. What signifies age is confidence, and you are missing it because of this. If you work out, take care of yourself and clean up, I don't see why you'd have a problem other than you are telling yourself that.