Are you in therapy?

If that is a resource you can't take advantage of find yourself a workbook. I am doing very well with my self directed CBT work. The ability to self-advocate has greatly improved. Much of that comes from an increase in self-worth and decrease in the negative automatic thoughts that seemed to run my life. Perhaps you can learn to do the same.

Change is not going to come over night. Set small incremental goals for yourself that are realistic - and reward yourself for attaining them.