Part of managing anxiety is working to make a difference.
I also recommend therapy. If you are in the United States, you can use this tool to find a therapist. See here for Canada.
Yes!
I always recommend checking out the following organizations, which are active in many nations:
https://a22network.org/ the a22 network is a overarching network of many national climate movements using civil disobedience.
https://fridaysforfuture.org/ Fridays for future was created after Greta Thunbergs peaceful protests and now has many national networks using mostly peaceful demonstrations.
https://scientistrebellion.org/ scientist rebellion is a worldwide network of scientists using civil disobedience. Again there are many national groups within.