Wow I'm so sorry that your training experience went this way. It is not policy at all. That would make me feel nervous coming into work. What about online training?
I will agree that you *might* be in too deep, and you probably wish you said something earlier. If I were in that position I would honestly anonymously call another store and ask them what they think you could do, partner to partner. Idk what a DSM would say about this at this point.
However, I think the best tools for you to learn are
$1 study guide, the recipe cards that are all together, and on partner hub there is also a shots/pumps guide.
I will totally send you all of my training notes for each station if you'd like. (I hope I am allowed to do that?)