It helps to remember anxiety, stress and depression are natural responses to the psychotic nature of life under capitalism. You aren't broken society is.

Tankie Group Therapy was really good during the genocide but I think it may have disbanded.

If you search free pdf CBT workbooks for stress/anxiety/depression that will give you practical outlook on how to help tackle them now. However, it is also wise to seek formal professional medical help and therapy if possible/appropriate.

If you want a dialectical materialist perspective of mental health as a dysfunction of liberal society then looking into marxist alienation or books such as Fedirici's Caliban and the Witch, Fischer's Capitalist realism, Davies' the Happiness Industry, Wilkinson's Why More Equal Societies Always do Better, Ehrenberg's History of Depression and Levine's Commonsense Rebellion may give you a broader outlook (not all the books listed here are strictly marxist).

If you really want to do a deep dive specifically into the specialty of mental health is to find/look up a local medical school and ask/search for the reading list for psychiatry.

Edited to add:

• Kaplan's Synopsis of Psychiatry (academic)
• NHS Every Mind Matters (laymen)
• the above two have the caveats that they are affected by liberalism, which is a caveat learning any topic in the West