So unless you have a region specific guidebook, and can make an absolutely positive identification (which probably involves identifying spores from a print under a microscope for LBMs), you really should not forage LBMs or any mushrooms for that fact. In some cases you might also need to know how to safely taste or smell the mushrooms and then know what you are tasting or smelling for. No beginner is going to be able to do any of that.
Let someone else grow them from a verified strain from a syringe. It's much safer.
As an aside, mushroom foraging is very beginner friendly as long as you stick to the right categories. Things like Chicken of The Woods, oysters, and maitakke are very easy to positively identify and don't have many look alikes in most parts of the US. The often propogated idea that mushroom foraging is only for safe for trained experts is totally untrue. The average person can safely forage for mushrooms. Just buy a region specific guidebook, and stick to the categories that your book tells you are safe for your region.