Start with low gear, sit and spin. I prefer to spin 90-110 on hills staying seated with short (10-15) out of the saddle efforts on long hills every 5 min or so. I got my Triathelet boss to work on hill climbs like this an he finish his fist ironman (Wisconsin) on a bad ankle (twisted) with a great swim and bike the marathon he walked. If he can climb hills now you will be to.