Yep! I'm a fairly fit, but tubby, 58 year old and if I can do it, you can do it. 19% of the pilgrims who get their Compostela in Santiago are over 60 and there are all sorts of body types on the Camino. A acquaintance of mine was very overweight, had a heart problem and trashed knees, but she wanted to do the Camino. Of course, she cleared it with her doctor in advance. But her plan was to walk ever so slowly, take a bus/taxi when she needed and score the occasional massage. And she did it! She completed the Frances, taking ~60 days (whereas most people take 33-45 days). Set realistic expectations for yourself. Do shorter distances...or a shorter Camino route. Do what you feel that you can manage, whatever the distance, and it will be a transformative experience.