I completely understand your taking on it (It's your very first Camino, after all, and you cannot know what to expect).
Do your research and read-up: This forum is an abundance of qualified information. Use the Search function.
There are many magnificent things to see (I assume the
Camino Frances): The very first day of walking, just being there, and knowing that you have made it to the Camino, and
you are there, walking! The first week: You understand the system and the ease of it. The communal albergue in Granon.The Chalice of Christ in Burgos. The plains of the Meseta. The Cruz de Ferro (Bring a stone). Ponferrada's magnificent 1100 AD Templar Castle. O'Cebreiro. The huge monasterio of Samos. And much, much more. They are all directly on the Way-
But, hopefully (and I think you will discover it), the most valuable you will find, is not a holiday/vacation/sights, but your own new soul. The Camino has a profound impact on many people. Cannot be explained (by me), but nevertheless it exists. I hope you will get to see the most important thing you can find/see on the Camino: Your
you. The Camino is about you. And remember, however weird it may sound now, The Camino will give you what you need, not neccessarily what you want. And I am not talking about sights, but
you.
All this may seem meaningless to you right now, but you will (hopefully) perfectly understand it when, after weeks of walking, you stand in front of the Cathedral in Santiago de Compostela, realising that your long walk is over. But a new one is in the making: The walk of the rest of your life, based on lessons learned on the Camino. The Camino is a strong teacher.
And then you will return and walk again in order to better understand what happened to you, and become even better
And you will become an addict like so many of us.
As soon as you have started walking, the best plan is to not have a plan. Let each day decide. Be surprised and make decisions accordingly.