Monirose,
I'm 46, have scoliosis, flat feet, am blind in one eye and am currently recovering from a work injury, torn cartilage in my hip which has left me overweight, out-of-shape and with a possibly permanent limp. I know noone in Spain and haven't hiked a mountain range in the last ten years. (To be fair that hike was a long, 70 pound pack through the Grand Tetons). I leave for the camino in April of 2013, just weeks before my 48th birthday. I'll be leaving behind all of my electronic devices, quitting my job, leaving no established home behind me to come back to and abandoning myself to a pilgrimage. At this point, I'm terrifed.
But my advantages will overcome any adversity. I love adventure, enjoy meeting new people, am very happily Catholic and adore seeing the inside of churches that I've never been to before. My impaired vision leaves me astonished at every new thing that I see. And I really enjoy just ambling along, taking in the sights. I have a year and the will to get me back into walking shape, limp or no.
You, too, must have some sort of 'will to adventure' or 'will to peace' or you wouldn't have made the plans. Fear keeps us careful and appreciative for every small success along our route. In each great success, overcoming and understanding the fear that accompanied you into it will leave you ecstatic. If you weren't at least a little trepidatious, that's when I'd recommend being nervous.
I look forward to hearing all about it when you return. Peace and joy be with you, P