29F: Need some serious advice about doing another bachelor's

I have a bachelor's in English but I don't care for any job that you can get from it. I want to do another bachelor's in Mechatronics in Germany.

I am going to start German classes and I have enrolled in 12th grade Science and Math exams as I didn't do Science and Math exams in 12th.

Is it ridiculous to do a demanding degree at this age? I also have ADHD and autism which probably explains why I don't have a linear timeline.

My non-linear timeline is giving me constant anxiety. I really want to turn things around.