Ha ha ha. Cathryn, you are probably the only person on this forum who would think I have any facility with maps or wikiloc. It's obvious that you haven't been on the forum long, or you would have seen some of my idiotic questions.
I am a pretty clueless technologically challenged pilgrim.
On the Frances, you do not need to know anything about wikiloc, GPS tracks, or anything beyond being able to look at the arrows and follow them. I know you have been researching all the Romanesque and Visigothic churches near the camino, but maybe that's just contributing to the anxiety. You're not going to see all that Spain has to offer on your first (or on your twentieth) Camino. So, if it were me, I would maybe get a kindle version of the Davidson/Gitlitz book (I carried it on my first Camino and that was silly -- it is ridiculously heavy, but I have heard there is now a kindle/mobile version). And then just focus on seeing all the little jewels you will pass (or will be within a stone's throw of) on the
Camino Frances. There's enough of the Romanesque on the camino to fill you with awe. And many people just walk right by, because they aren't interested or because they don't know about it. The Davidson book will keep you informed every step of the way.
One thing to consider as you plan all these detours is that as you are walking, you are likely to develop strong ties with a group, your "Camino Family." Are you going to want to pop off for a bunch of side trips and then start over to rebuild social ties with new people? You may want to on some occasions, it may be a good way to disconnect from a bunch of rotten apples (that does happen every now and then), but it's probably more likely that you will have strong bonds with a group that you don't want to lose. But never fear, there are plenty of places on the Camino, so you can have your cake and eat it too. And if you can find a pal or two who wants to detour to Santo Domingo de Silos or San Miguel de la Escalada (easy to do by taxi during a rest day in Leon, for example), those may be nice ways to break up the walking and give your body a rest.
So, just know that being scared is part of the routine, even people who have done this many times are anxious and a bit apprehensive before starting out, but once you take the first steps, that all melts away and you just focus on the present and doing what you went to Spain to do. March 20 is coming up, and I can't wait to hear how it goes for you!