Welcome, don't feel bad, this problem is not so uncommon and you are not the first one to ask...
I once bought a multitool for my daughter to take on camping trips, I forgot to tell her that to close one blade you had to partially open another one, it came back disassembled after the first trip, nobody in the group could figure it out even after they took it apart.
I once saw an opened old Italian style automatic in a local shop, the lady there didn't know that you had to push and rotate the left bolster to release the blade.
Some other interesting locks are those in which you push down one blade to close another, or those in which you have to position the knife vertically with bolster facing down (there's some gravity operated thing that blocks the blade), or those in which you sort of scissor the handles, and then there are some with hidden buttons, etc.. Even regular locks not designed to be hidden can be tricky.
Luis
"He who asks may be a fool for five minutes, he who does not ask remains a fool forever".
Edited: Oooops missed a word...