starting urban rebounder tonight

I wanted to clean up my room more before I set up my urban rebounder. (trying to be more organized and declutter) I am looking foward to using it.  There is something wrong with my right knee.  So I always try to do things that are low impact. Some of  the work out dvds that I have that have high impact moves in them.  I modify the movements.  I want to go harder than I have been.  I used to jog and walk several miles a day.  The rebounder is supposed to absorb much of the impact thus allowing me to really do an aerobic work out. It is the elevated rebounder so I will be able to use it on an incline.  I will start it tonight. 
I know that I am going to have to go back to the doctor about that knee.  I left my job that I had the insurance with.  I can not afford to get insurance with my full time job because I have to have that whole pay check.  I am not looking forward to going back to the doctor anyway.  I got stuck with a bill from the last time I went to the emergency room and orthopedic doctor.