I understand. I think you need to sub in other activities. This could be something like calisthenics if you want something more technical. There's a German online group called Calimove that have an "At home" workout and also some Calisthenics (starting from basics) levels workouts if you want that. There's some free Youtube stuff, and then there's some paid courses that give exact workouts. If something more basic is what you're after, biking or running.

It's a time of adaptation, and it sucks for sure but it's simply Necessary. If I told you what I'm doing instead of olympic weightlifting you would laugh. However it really helps reduce that exact angst you're describing (which I'm very familiar with as well). I consider physical exercise to be as critical to me as everything else, and absolutely essential for my mental health. I happen to be an introvert as well and feel similarly, btw.