Buen Camino! Youngsters such as yourself should have no real problems! We Old Fogies can perhaps lend a hand. Get a good guidebook, know where you are going, and absolutely ignore any information concerning recommended daily distances. The best recommendations will come from your own body your own mind, your own cares. It will probably take a few days (maybe a week and a bit) to hit your own pace - that which is comfortable for you yourself! Give yourself some extra time and enjoy every minute! Take hundreds of photographs, pop into every interesting thing you see along the Camino churches, shops, museums, stop in for coffee, beer, lunch whenever or whatever y-o-u feel like it. You have a couple of days in hand go then stay and Santiago and enjoy the sight or on to Muxia or FisteraDo be prepared but here is no reason to go overboard, you and your body should decide distances, times, places, and why. I can still do 30k a day but the next day, I feel devastated and cannot walk half that much so what did I gain? Hostels are very welcoming places, after some time the ideas of daily communal bathing, daily communal sleeping, daily communal dining can become tiresome so check your guidebook for hostels with private rooms, look around for inexpensive hotel lodging, B&B's, casa rural, all of which will also allow you to take dinner in a restaurant - pilgrims menus are fun and filling but can become boring as well. The Camino is journey into yourself as you continually ask why am I doing this, allow your mind to wander though "Remembrance of Things Past" but also into the present and the future, enjoy the company and camaraderie of fellow pilgrims, you will enjoy daily achievements and confront the occasional difficulties, but know that as you triumphantly walk into Santiago this has been a marvelous experience.