Try to do things that are relaxing and enjoyable. A hot bath, a walk in nature, a yoga class. Mindfulness is also a big help in reducing ones reaction to tinnitus.
It is really hard when you first get it because the brain is not accustomed to it and it can be stressful & anxiety inducing. Given time and efforts to practice mindful acceptance /relaxation, it gets a lot easier. Then life goes back to normal.
If you're really struggling I would suggest going to the doctor. Clonazepam was a huge help for me when I was feeling extremely anxious.