Two separate settings. The campaign is your DM's call; the character is yours. Both are kept in this browser only, and neither is sent anywhere.
Which spheres your deity grants, and how far along your priest is.
Not filtering yet. Grant at least one sphere below and the browse page will show only what this priest can cast. Level and Wisdom alone do not switch it on.
Casts up to level 1 spells.
Major access reaches every spell level in the sphere. Minor access stops at level 3. Every priest has the sphere of All. At least one sphere must be granted for the filter to apply.
Which sourcebooks are legal at your table. Tick the books that are allowed. None ticked means all 48 are.