Hi,
You are doing a lot of thinking ahead and getting prepared and that is wonderful. What you don't want to do is push to hard. Listen to your body and get lots of rest as that is what is going to repair your body the fastest.

Going back to teaching full time and being on your feet and talking so much seems like pushing a lot. Neck dissections create other side effects like muscle pain that extends below the neck area. Just being able to stand and talk all day is a HUGE effort, one you take for granted when healthy.