Hi,
I believe you already got good advise. Anyway it is normal to have anxiety and second thoughts before travelling in to the “unknown”.
And as you can read it is definitely possible, but that you might have to change your plans as you walk and if you are open for alternatives, you could up ending having the adventure of your life!
I am also sure, that if you in general trust God, and that you until now have been able to — then I am sure there have been more severe situation than this one.
And even though you have to book ahead on the go, I don’t believe it‘s much different than for life in general, you have to adjust even though you trust God.
If you are looking for a reason to cancel, there are many reasons to take from
I do feel you are writing from a point of fear… and it is easy to claim, that you don’t need to have fear. But without exaggerating there are many locals and pilgrims, who would help you if you really need help!!! And I personally believe they will be there faster than God
Buen Camino