What engine would most suit a RPG game that’s 2.5D isometric view, is kind to new developers and has a whole load of reference material so I can teach myself as I go?
I only have experience with Godot, but from that I can say its documentation is really good and has helped me so far to teach myself important stuff (am really new to game dev, but had some programming experience), and I do know it has support for isometric tilesets.
Unity, I have no experience with, but I guess it's overall more mature from being in use so much. It does come with some issues, see the scandal around their planned profit sharing policies a while back, which Godot circumvents by being free software.