RELY on what your foot doctor says and advises. BRING YOUR BOOTS when you see the doctor. Explain what you are going to do.
Everyone's feet are different. What works for one person will not work for another. So, with respect, take all the above advice with a large "grain of salt..."
Personally, I have two totally different feet. My left foot is 'normal' in all respects. However, I was born with a slightly misaligned right foot. It is set to a permanent 5 degree outward angle from center.
Apropos of nothing, this drove my drill sergeants crazy when I served in the military. Even when I was standing at attention, with my feet on the pre-painted feet on the tarmac, my right foot was wandering... This also caused me to have to do a lot of additional push-ups as the drill sergeants always assumed I was trying to have a joke on them... You do NOT argue with your drill sergeant.
This foot is also 'canted' or angled off-level by the same degree. It is permanently pronating... rolling to the outside...
This means that the right foot generates SERIOUS callus material that the left foot does not. Monthly, I obtain a pedicure, during which the technician has to use a RASP to file off the very thick dead skin. I always joke that we need to call the farrier (a specialist who trims horse hooves and fits horseshoes).
Each night, I use specialized foot cream with a very high Urea content to slow down callous grown. I then sleep in cotton socks. But, this only slows things down so I can finish a Camino. I still need a pedicure when I am done.
This congenital condition also necessarily means that most ALL store-bought orthotics will not work for me. Hence my advice to seek the consultation of a foot doctor, and obtain custom orthotics, UNLESS your doctor says that both feet are relatively the same.
FYI, the only over the counter, store-bought orthotics that have any effect for me are the Dr. Scholls, GEL FILLED full insoles. If you get these, remember that they may not pass through airline security, due to the gel fill. In years past, the gel was a concern for security procedures.
On my first Camino, in 2013, a podiatrist in Burgos threw my Superfeet green insoles in the trash exclaiming "BASURA!" He had to operate on infected calluses on my right heel. His conclusion was that the rubbing of the Superfeet insole exacerbated my calluses. This nearly ended my first Camino. But, as the procedure was successful, I was able to proceed after a three-day layover at Burgos.
That was the end of wearing the green Superfeet. When I got home, I switched to a softer Superfoot... I use the orange line for my casual footwear to some effect. But, IMHO, they are not sturdy or supportive enough for sustained long distance hiking while carrying a load.
I always pack the gel insoles in my checked rucksack with poles, and wear the insoles that came with my Keen boots while I am traveling. When I get where I am headed, I mail the factory insoles ahead to Santiago, along with other things I will no want or need until I arrive.
Hope this helps.