Depends on the fae. There’s a lot of different types. Nature intelligence are the spirits of plants, of place and the spirits of entire species of plants, insects and animals. They are usually happy to work with humans for gardening and and co creative projects like Perelandra and Findhorn.
Thee are not so much like the fae of folklore. They have been called Devas, borrowing from the Hindu word for shining one by one author I read. I lost the book but he was Polish and it was something like Marc Polzac.
To get on thier good side, leave them bread and milk at night, but, there are stories of people being cursed if they missed nights, so it might be best not to start. I leave out gifts an as one offs that seems to be fine. I suggest giving them natural things, biodegradeable things, no plastic or anything toxic like alcohol, nothing an animal could get hurt by or stuck in.
In The Elves of Lily Hill Farm, you start to meet the more folklorish fae. These and other friendly fae like hearth goblins (I know nothing about the new stuff from E.A., but I’m skeptical it’s just an anime egregoric thing, hearth goblins aka brownies are a very different thing, and solitary, and it’s amazingly good luck to have one in your house protecting it), your larger spirits of place, forest guardians, spirits of streams and wells and trees, pixies, nyads and dryads.
If you work the Norse pathworking by E.A. you should meet light and dark elves, I don’t remember if he goes into meeting land wights and trolls. But the book Elves, Wights and Trolls is rather good for that.
And after all that there are the unseelie fae. Those are the ones you can feel at night when you walk out by yourself camping, and notice a hostile presence watching you from the dark. The ones that will pretend to be a friendly light and lead you to get lost in the woods, changing the path under your feet so you think you’re on the right way, until you’re not. Some just think it’s funny to mess with you, some want you dead. Just stay away.
How they look to your inner vision is between you and them. I’m not that visual, and I get impressions of moving light, or more often just a presence with thoughts and emotions. The nasty ones can look like monsters rushing at you in the night.
Some say that some of the fae are higher dimensional beings that literally now live in deep cities underground, hence the old album “The Hills They Are Hollow” by druidry folksinger Damh the Bard. A lot of Celtic tales and some Germanic talk about finding the fae underground, lit by crystals that shine with a light of thier own. You can use the imagery to journey shamanically to these places for spirit quests.