. Do not gather them at all if you lack the skill or access to a professional mushroom inspector(Europe in luck)
Ive said this elsewhere on the forums and i will repeat it here. I am not a forager, but do know a little. And two seperate professionals have taught me the exact same thing.
1. Foraging knowledge is very local. What might be reliably one species in location A in SE asia, is almost certaibly toxic species B in Midatlantic USA. Every year or so this kills some family who relocated and did not realize their experience no longer applied.
2. If in doubt fuckin dont. The level of discernment needed for mushrooms *is* hyper autistic in some cases.
3. In many locations there are easy to identify "beginner" species. These will have some quality that makes them different from all else that a microscope isnt needed for. Or they will have only non toxic lookalikes whose worst downside is not tasting good or being tough/chewy.
#3 i used to know several only recall reliably one but would have zero issue differentiating it even now from so called lookalikes.
Every year too though some idiot ignores some reliable rule in hopes of something tasty and gets sick or worse. And thats the obvious shit.
The difficult stuff is best left yo people who have worked their way into that knowledge with mentors and using microscopes and such as backup. Until they too are the professional.
Also also: for *North America* - there is no mushroom toxic to pick up in your hands. If you need a better look, take one. Even a death cap cannot hurt you if all you do is look, pickup, and toss that fucker back. You actually have to nibble on them to be deadly.
And for those of you foolish enough to want the "fun" shrooms - foraging is not the hippy clever move here. Gallerina marginata exists and will kill you. If youre going to be a degenerate, dont be a retard at the same time.
This does not apply globally *or* to plants/molds/anything else for the holding ok rule. I know for sure its untrue in some asian countries