Lynne, a couple of things.
for Rotate I usually draw a square and pull it into a cube so that I can set the protractor (rotate tool) to the face that I want.
Once it is on a face you hit the shift key and you can take to anywhere on your model and use it to rotate.
First Select the thing that you want to rotate.
your drawing is off axis in two directions.
Make it flat and rotate it to the red axis making sure it is also flat on a plane between the red and green axis.
Draw a rectangle at one end Push pull it into a cube or box. Draw a diagonal across the face and then draw a circle on the face.
Move your drawing right to the middle of the circle.
Select the circle, just the Line, not the surface. If you double click inside the circle you will get the surface and the circle. Hold shown shift and control keys and deselect the surface. Now you have the circle selected.
Select the follow me tool or 'shift F', then click on the surface that you want 'turned' and you will have the spindle.
How many segments you make your circle out of, 24, 12, 8, etc. will affect how big the piece ends up in terms of bytes.
The circle that you 'follow has to be a bigger radius than all of the parts of you drawing or you will get holes.
Remember for follow me it is- select path/ Shift F for follow me/ select the surface that it going to be followed or extruded. it does not have to be a circle it can be a bunch of straight lines for a baseboard or crown moulding or the edge of a step.