Trekking the Camino Ingles

My friend and I are planning to trek the Camino Ingles May/June 13. We are both 63. He is in good shape and I'm in fair shape (ex smoker) . Both of us are preparing by walking long distance and carrying packs with about 20 pounds of gear. So far all of my walking has been urban in nature, some up, some down, most level, 5 to 10 miles at a time with traffic signal breaks. We will have 10 days to do it, which I'm sure is more than enough time to smell the roses along the way.

I'm reading that parts of the Ingles are quite steep. My questions are, Cinque Terre steep or Alsace steep. Will my training be enough. Can the long day , 29+ k, be broken into to 2 days and where can we stay for the night if it can. We are open to any kind of accomidations and have camped rough before.