Just get the knee right, you can sort your career/life out later. It really sounds as though it is going to take some time and should not be hurried.
The ligament on the inside of the knee is the most vulnerable and is sometimes forced out of place...as well as becoming inflamed. The way it are held ‘on track' is complex and you need to know that is in the right place before any attempt is made to start exercise or even physiotherapy. (Given that you may need some help to get it right in the first place.)
It's not just the job, you have to consider how would you fare in the midst of a major emergency of course.