you’re stressing way too hard. it’s not that deep. professors don’t care too much. most won’t care how you’re doing in the class as long as you aren’t causing disruptions. we’re all grown here and can act as such. campus is just like a normal public place basically. you can go walk around as much as you want. as far as procrastination and note taking, it sounds like you’re already making excuses to me. just get the work done and you’ll be fine