my advice is to use the Camino guides as just that. A guide. During training you will get a sense of how far to walk a day. The first week is a breaking in period, but also a beautiful journey that should not be rushed. We took an extra day in Pamplona, Leon and Astorga. We also took a train to San Sebastián and Bilbao after Leon to explore.
Put some extra days in your plan for the unexpected. If you live an area and want to stay, then you can. If you are tired or hurt, you can rest.
The most frustrated or disappointed pilgrims we met were those that did not plan enough days for their pilgrimage. It’s not a race to Santiago, it is a beautiful journey.