Tutorial - how to create a simple revolve
Start by creating a sketch on the right plane(make sure to use the origin point as the center of the revolve).
Visualize and draw the desired revolve form and then add dimenions.
Make sure you have the centerline in the sketch too, it is important to creating the revolve itself.
More dimensions added and the sketch is fully defined :)
Select the revolve boss/base from the tab and click it.
As the feature opens, it asks you to select the center of rotation. Select the previously drawn centerline and voila!
Congrats, you are now awesome :)
Experiment to gain more knowledge!