Hey IslandPlaya !
It may look like blueprints, but the Dataprep UI is a bit different with how you use nodes and filters/operations…
You are supposed to first use one or more filters (filtering goes from top to bottom of the stack), then one or more operations under your filters. 
We are looking into improving the UI and UX in the next releases of the tool, so your feedback is appreciated !
Hope this helps !
Antoine