I feel like if you feel like you need to cultivate a mindset for a particular activity, you are probably better off finding another activity. Unless you have extremely specific goals that really demand a particular exercise, it is better to simply be moderately active doing something you enjoy doing.

I've tried running/jogging, I am actually not bad at it. I freaking hate actually doing it though, I would rather be doing almost anything else. Which makes it a terrible exercise for me to do, because I will find any excuse to not do it. Same for lifting weights. I enjoy swimming but dislike public pools, in my current country nobody has private pools, even the rich.

For me I have always enjoyed martial arts, particularly sparring. I can't necessarily find people to do that with regularly where I live now, but I can still practice forms and the like by myself. I get a not insignificant workout from regular Beat Saber sessions too, honestly.