Hi @AstarionBG3 welcome to the forum.  I think it's great that you are looking for support for yourself as I can imagine it's incredible difficult and stressful for you, and your family, to support your brother.  We often get so caught up trying to help others that we can tend to neglect ourselves.  So helping yourself, obviously help you, but also puts you in a far better space to support your brother.

I know there is a guide here on bipolar that you may find helpful with your brother.

https://www.sane.org/information-and-resources/facts-and-guides/bipolar-disorder

But as for yourself, continue what you're doing to reach out where you can.  You will hopefully find even just sharing your story here, and just connecting with people and talking about yourself will be helpful for you.  So again, welcome, and feel free to share as much as you feel comfortable with and there's many people here that will listen to and support you.