What is the point at which abiogenesis is complete and evolution begins?
I think it's a mistake to assume that there is such a point. All plausible seeming models of abiogenesis currently under consideration involve evolutionary processes long before they reach the stage we'd consider alive.

Evolution will occur whenever there is (a) replication-with-error and (b) selection (simplifying slightly). This is the case with a self-replicating RNA. It is replicating, but those replicates can be imperfect. Imperfections in replication that improve its ability to replicate will be favoured. That's evolution.