How can I start getting familiar with the plants, trees and animals around where I live?

I like the iNaturalist app: https://www.inaturalist.org/. When I see something I'm interested in whether plant or animal, I upload a picture and it tells me what it thinks it is. And they're trying to collect good data about flora and fauna so there are volunteers who review submissions and agree or correct it, so it's not just an algorithm doing the work. Obviously when you upload it it's a computer making a guess but people usually review the uploads later, and you can get emails with the results of those reviews.

Someone else mentioned Merlin for birds, which is cool because it can do image ID or bird call ID.