“because the RNA is the entire virus, it replicates proteins for more whole virus.”
Replicated is the wrong word. The proteins are translated from the RNA message. You use replication to refer to protein translation in a subsequent paragraph as well.
As far as how this RNA vaccine works, I believe the translated antigen sequences are processed and presented in MHC.
You are of course correct. I was trying to explain it in lay terms. However, a live virus in a cell that is RNA based will translate the entire genome several times in order to reproduce. But you point is fair and technically correct.