Dutchy, Checkout the free self paced classes that Onshape has on their website.  They are pretty good and include an exercise  that you can download , usually using the the same example in the class.  For me, completing the exercise at the end, really helped drive home the content of each class and definitely help me to learn how to navigate the software, menus, etc.  In a couple of instances, I went back to repeat the class when I could not remember exactly how to do something as I was drafting a design, which really helped.  

--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.