Google "Desiderata" and read it. It says that "you are a child of the universe, the same as the flowers and the trees; you have a right to be here. At the end, it says that "despite of all the sham, drudgery and broken dreams, it's still a beautiful world. Strive to be happy."
Are you doing things to make yourself happy? Is there something you would like to learn and enjoy doing? Playing music? Sewing or knitting? Writing? Taking classes at your local college? The world is full of possibilities. Join a club or just drop in at your community center and see what activities they have. Exercise is especially good for depression.
If you need to pray, just do it. Whether anyone is listening or not, you will unburden yourself of your anxiety.
Best wishes for a happier future.