Cleared for exercise

Hi All

I was cleared yesterday to start exercising.  I have been walking since surgery which was 2 1/2 weeks ago.  My question is what do I start with?  I still am not allowed to pick anything up for 5 weeks more than 5lbs and no sit ups he said for 5 weeks.  Just not sure where to start as I have never really exercised in my life but this surgery is making me want to climb a mountain lol. 

Hi! Im curious myself abt where and what to do to start. I hope some ppl jump in and reply... Wish you all the best .