If my ex husband emailed me and said he was wearing the wedding band from our marriage and wanted me to put mine back on, I'd lose it.
I'd tell him a few choice words and not to contact me anymore. I would tell him that if he continued I'd report him for harassment, and then I'd block him.
When you get a divorce it is over. Hanging onto it is unhealthy.
After my divorce, I gave my ring away to another woman who was married, had lost her ring, and they couldn't afford to get it replaced. That particular ring meant nothing to me anymore because that marriage was dead and buried. When I divorced my husband, I meant it.
I think you need to stay away from the incel culture. It's not healthy.
What you need to do is work on becoming a good friend, a good boyfriend, and a possibly a good future husband to someone else.
I've been divorced for 17 years, if I'm doing the math right. I have had men in my life since then that I've have tried having relationships with, but it hasn't worked out. That doesn't mean it won't eventually.
But I am coming to a place in my life where I am accepting that I might not be married again. When I was first divorced and in the first 10-15 years after, I would have been devastated to know this. Now I'm ok with it. I'd love to be married again, but I can be happy and healthy without another marriage.
If you don't want to spend your life solo, then work on your mental and emotional well-being, work on relationship skills. Don't immerse yourself in an echo chamber of incel communities and blackpill (whatever that is).
As to your mother, taking care of her in ways that are healthy and with boundaries is appropriate. Listening and considering good and reasonable advice from someone you respect can also be a good thing. Respecting her boundaries for herself and her home is the right thing to do when you are in her presence. But feeling you still have to obey her in your adult years for things that don't directly affect her is problematic. There are men I have rejected for this reason.
If you want a healthy relationship with a woman, you have to function as an independent adult, and in marriage your spouse and children have to come before you're other family members. If you're girlfriend or wife wanted you to do something but you told her you couldn't because you have to obey your mom, a lot of healthy and independent women will walk away from that situation.
A husband is told in Scripture to leave his mother and father and cleeve to his wife, live independently of parents.
You could find someone who is compatible in regard to caring for your mother, but that doesn't mean they have to accept you being obedient to her as if you were a child and not a functioning adult with adult relationships outside of your family.