Oh boy. How I feel for you. First of all I hope you have a speedy and full recovery, with little or no discomfort.
It's very unfortunate and I surely understand how upset this must make you on many different levels.
But thank goodness - this is temporary. Thank goodness this is not longterm. And thank goodness - you've got a great attitude.
Yup, according to what "they" say it's 80% food and 20% exercise. Now of course exercise has loads of benefits that we don't want to give up on, 20% IS a nice amount after all, but for now, just for now, you will have to scale back a bit.
Do the very best that you can with the wonderful suggestions you've already been given. Stick to your food plan like glue, and you just may be pleasantly surprised at the outcome.
By the way, my daughter broke her foot about 7 weeks ago. After a few weeks she was moving around pretty well. So you never know you, there's a good chance you may too.
I wish you the best of luck.