Just remember when foraging for wild edibles (including dandelions) to avoid areas that have been treated with pesticides, or where dogs may have peed. Avoid golf courses and train tracks and old farms.

Dandelions are pretty prolific but I would also be mindful of abundance when foraging other plants. If there is only one or a few of them around, don't take it. There's a 1-in-20 rule for this.

There are a ton of books, YouTube videos, and probably some in person classes in your area on this stuff.