I think fear is normal. I experienced it during the black belt challenge. It can help to motivate you to practice and improve. You can just keep on working towards that goal and face that fear.
Take it one day at a time. Look at the challenge as an accomplishment every day every week. Little steps will eventually add up to big steps. See you in the dojo.
Physical therapy is excellent in helping strengthen your knee and shoulder. It will help doing it almost every day.
Sensei knows a lot about nutrition. He can help you if you talk to him about it.
I think fear is normal. I experienced it during the black belt challenge. It can help to motivate you to practice and improve. You can just keep on working towards that goal and face that fear.
Good for you to take the first step. There will be many more steps. Just keep on doing one step at a time.
Take it one day at a time. Look at the challenge as an accomplishment every day every week. Little steps will eventually add up to big steps. See you in the dojo.