So right now I am growing my own mushrooms (a couple different kinds). I also forage for them on hikes (though if there is any amount of uncertainty I won't eat them). Maybe not the exact same as being able to live off of the grid but it is definitely a start. I also have a book that covers the plants that naturally grow in the area where I live and what they can be used for (along with which ones to avoid). Therefore I would say my answer to the question of whether I could survive if things collapsed, yes I think I could survive.

However I am still really reliant on supply chains for a number of things so if everything collapsed tomorrow things would be rough but I do truly think I have what it would take to survive the adjustment period.