Ouch! I am sorry you are going through that! I hope your thumb heals quickly.
I know the feeling... years ago my daughter was invited to a roller skating party and she had never roller skated. So I took her to the roller rink well before the party so she could learn a little about it. In my day, we roller skated all the time and I was quite good.. When she was in the stroller, I participated in a mom's stroller stride group so I was confident in my abilities.
Well, things were going fine until I fell on my butt, broke my tail bone and right arm. While I don't consider my right arm unimportant, you don't understand how much you use all parts until one part can't do it's part for your body.
We had to go to the salon to get our hair washed. I was out of commission with chores, etc. It was miserable.
So I completely know where you are coming from on this one.