@Duey0074, welcome to this forum. The answer to that question is going to depend on what it will be that you find "hard". It will rain sometimes, sometimes for days, you may get cold and wet and find yourself putting on cold, wet clothes one cold wet morning. Not "hard" maybe, but an unpleasant experience. It will get hot, possibly very, very hot. You will risk dehydration and worse, sun-stroke, unless you take proper precautions. Again not "hard" but common sense and personal discipline are essential. Thirty days of walking with a pack on your back, every day, day after day: that can be hard, many find it too hard. Blisters, shin-splints, knee-strains and sheer fatigue have stopped many of the willing in their tracks. Boredom kills it for some; too much party-fun has stopped others.
You are 17, athletic and an experienced hiker, and you
want to do the Camino. Prepare well and the camino will only be as hard as you make it for yourself. Enjoy it, it will be wonderful.