I work with the Fae, but it’s more like, you don’t “use” Fae magick, they do, and you talk to them.
I think the best shotssources for how to work with them are in the folklore. The collected works of Winifred Finlay have the most authentic lore I’ve seen, but it’s very read between the lines. You also see good stuff in the Waldorf education books. Most modern books are romanticised nonsense, including the Seelie “court” idea. That’s not a thing ime that’s fiction and will lead you down a path where they will not take you seriously. It’s like calling all nice humans a “freindly court”… we’re all different and so are they. While the lore are also fiction, the lore is old truth and teaching tales/morality stories mixed in.
It boils down to developing your own way with the local fae in your area. I suggest focusing on plant fae only to start. These are freindly or “seelie”, you can easily avoid the unseelie which includes some cryptids when you simply grow a garden. You can build fairy houses and leave them presents, and they come to you, as which point you ask them what they like, how to grow better and they like that.
The books Findhorn and Perelanda teach you how to work with the plant Fae very well… you grow plants and work with the “Nature intelligences”. Anything about “fae magic” is bullshit… the fae are very real, very practical and close to this plane, to work with them, get outside where they are and get your hands dirty