You need to understand mechanics, then you’ll know what devotions to grab first, or experience / reading others’ builds. Pathing also depends on preference / content / how quickly you gain devotion points. Maybe read some beginner / levelling guides to get a feel for it Beginner build guides Compendium (for AoM + FG expansions)
Paths to the same endgame map may differ by how much you need to respec in general vs how optimal they are at earlier stages with fewer points spent.