Get several good books on identifying. Illustrations vary a lot, so several books are an advantage, even if the text were similar. Can't take any chances there. Make sure you know how to identify the poisenous ones, and avoid any edible ones that are just too similar.
Here something to start with
But also take care for the mushroom, when picking avoid disturbing the mycelium, best to cut at the base rather than yanking the shrooom out , tread as lightly as possible around the area, the mycelium spreads just below the surface over a larger area than the fruiting bodies would suggest. And only pick the medium sized ones, and leave plenty to grow on for spores. I have seen a great patch of chantarells devestated by inconsiderate picking. They never recovered after someone picked all but the tiniest, and trod over those as well.