One easy way to start is to exercise 3-4 times a week right after waking up. I do it for 20 minutes and I feel better. If I don't exercise enough, I feel guilty

One easy way to start is to exercise 3-4 times a week right after waking up. I do it for 20 minutes and I feel better. If I don't exercise enough, I feel guilty and also feel like crap after a few days as I do sit a lot (programming and video games)