[Glench]

Came here to recommend doing good deeds for others. I find when I'm doing things for the benefit others I feel a lot better (as long as I'm resourced enough to do it). A therapist used to tell me that gratitude and doing good things for others were the most effective evidence-based behavioral interventions for depression.

That said, depression, fear, and lack of confidence are multi-faceted things with many different mitigating and exacerbating causes. Even diet and digestive ability can play a role! I find light exercise to mitigate the effects, too. But a sense of warm-heartedness toward yourself and others will be helpful no matter what.