@DechanDawa , you probably already know about breathing, but I didn't notice anybody mention it. Here is one link, but there are several if you google
3 Deep Breathing Exercises to Reduce Anxiety | World of Psychology

Also, I have found that if I do some form of cardio that it is unpleasant for the first 30 minutes or so, but then it gets much easier. I always do cardio for 60 minutes or more, because otherwise it is all misery with no pleasure. FWIW

BTW: That is the number one reason that I refuse to take antidepressants - it removes the pleasure that I normally experience from exercising, and it seems to do nothing for my depression. Everybody acts like those antidepressants are an easy cure for depression, but I had such a horrible experience with them that I'm afraid to try again.