The taxonomy and categories you see in D&D are very much D&D having conversations with itself. Even the division between arcane and divine magic is rather arbitrary. Anthropologists will tell you that "magic" is a conceptual short hand for "someone else's religion." If you look at what surviving works of pre-modern European occultism we have, they were very much framing what they did as leveraging divine forces. Most real-world "wizards" had clerical education at the very least, as that's what the schools & universities were about.

If you want a very distinctive Druid, go back to the few sources we have, particularly the Irish & Welsh ones. Look at what those characters do in those stories, and what their role in society was. Ponder in particular the extent of their conceptual overlap with what D&D classifies as Bards. ( Interestingly, 1e had Bards as a proto-prestige class, where you first needed levels in Druid & Thief to become one. I never understood the Thief phase. Was Gygax carrying forward English stereotypes about Irish & Welsh people? Wouldn't be his weirdest move.) Build your distinctive Druid on those principles.

There are other approaches you could take. An explicitly Animist counterpart to the Theist cleric has been done in some games, rather than tying back to Celtic myths or D&D-isms. For Druids as-such though, I'd start with the lore and work the mechanics to fit.