Here is a simple 'trick' for twisting your sketch along a trajectory. You first create a helical shaped surface - using the Helical feature, sketching a line to form a surface, Then the edge of the surface can be selected as the x-vector in Variable Section Sweep. This will cause your sketched profile to rotate as it sweeps along the trajectory...

First trajectory curve can be straight or curved.
A 2nd trajectory (know a the 'x-vector') is sometimes optional, but if you do use one it must be at least as long as the trajectory curve, because it must be available to orient the profile sketch all the way down the trajectory... Here are 2 examples:
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