In a few minutes I made the following.
Using the command "Loft".
1e draw a route with several planes. (2 ore more)
On each plane the particular shape in a sketch on the plane.
Use command Loft to run in one shape from 1 sketch thru all to the last.
after that use the command circular Pattern in a assembly to make and run these 3 blades around an axle.
See further help at youtube "loft" and later "Pattern".
Or tell me the next problem you struggle or deal with.
Best Regards Tommy