For version 8.5 you will not be able to use Value Finder nor Scenario Planner as both are tied to Next Best Action Designer. You will see shortly in 8.6 that we have enhanced value finder to run outside of NBAD on custom strategy frameworks. Look out for the release announcements.
In 8.5 both of these features are not yet GA and are early preview edition.
There is a training course on academy that covers Scenario Planner which will be published when 8.6 goes GA, there are no academy courses on 8.5.
There are lots of great articles on Pega community, the landing page for Simulations and links to the scenario planner documentation can be found here.
We are currently finalizing the training and videos for the new functionality introduced in v8.6. Meanwhile, here's an older video from v8.5 that provides a high-level overview for Scenario Planner (without the newer features).