For 2024 Pilgrims: €50,- donation = 1 year with no ads on the forum + 90% off any 2024 Guide. More here. (Discount code sent to you by Private Message after your donation)
Sounds like you are taking the correct steps to prepare. I also had serious doubts but I quickly became aware of the fact that everyone does. I was 65 on my first Camino and I did prepare and it paid off.
Most important thing I learned in those first three days was to just go at your own pace...
This site is run by Ivar at in Santiago de Compostela.
This site participates in the Amazon Affiliate program, designed to provide a means for Ivar to earn fees by linking to Amazon