That's great, glad to be of assistance. I know completely what you mean, it really helps to cement the information I think.
https://reference.wolfram.com/language/ is quite useful overall for finding information, although there aren't very many that use a specific problem unfortunately: it's still worth a look though, in my opinion, especially using the search bar.
For actual notebooks, I'm afraid they're often quite hard to come by aside from the proper Wolfram Documentation. Ignoring that, I would say Medium (or other blog sites) can be really useful for hands-on tutorials, and I often go about that with search syntax, like (for Google at least), 'site:"medium.com" image recognition mathematica'. Being quite a small field, it only gave one useful result (building a Pokémon Card Detector in Mathematica), and not perhaps to everyones tastes, but still good for a follow along.
Blog sites overall are good for finding other people's projects, and even if you have to research the functions yourself, it's a lot easier to understand (at least, in my opinion). Hence why using search syntax for certain sites is better too.
In addition to that, I'd say trying slight edits to a search can be better too. For example, searching 'site:"medium.com" neural nets' returned much less useful information, because most of the posts will just be describing it and the functions, not doing a particular thing. Image-recognition, on the other hand, was more likely to have proper projects, if that makes sense?
Sorry for not being able to provide any concrete websites aside from the first, and notebooks, but hopefully this is of some use.
Best wishes.