The period before surgery can be stressful. I also felt apprehensive. In your case, and in my opinion, having two surgeries four weeks apart is really optimistic.
However, I'm sure that, as an active person, you will be able to recover from both surgeries, and that your surgeon wouldn't recommend this otherwise.
The advice above not to rush your rehab is good advice. I can absolutely confirm that efforts to accelerate your rate of recovery, can, in fact, causes an increase in pain and inflammation and will retard your progress.
Listen to your knee. Each rehab is different and individual and you have to not try to put too much pressure on yourself. Don't set time-related goals. Just work on a consistent basis, and let your knees heal.
Anyway, good luck