I think if you live somewhere with a lot of hills you can manage reasonably easily you will be well prepared.
I only manage to get out for a training walk twice a week, Thursdays and Sundays, so not even consecutive. With everything else going on, I can rarely spare the time to walk more than 10km. But that will always include at least 2 long steep ascents and descents (of around 1km each).
On the Camino I find I can easily walk 18-20km. I think the walking on hills really helps with my fitness and feel gives me more a lot more stamina than if I walked only on more level ground when training.
But if you are walking further when training, and more often, and including hills, you are unlikely to have many problems with covering your distances. Buen Camino!