First steps in the process...trying to design a drone propeller for Science Fair...I imported the airfoil coordinates via curve through XYZ, extruded that, but when adding the prop center, I sketch a circle (where the prop shaft will go) and try to extrude that and get "Must select direction of extrusion for 3D feature.." Nice hint, except nothing tells you how to do that. Click on an arrow? Type in an axis ID (X, Y or Z?), click on a plane (I don't see any planes to click on...)

HELP!

Mike