Creating holes

Preface-I am entirely new to using CADs and 3D printers, I only ordered one to make one product so I am extremely new to this software system! I am trying to create a 0.2 inch hole in (more like on top of) a 0.9 inch cylinder (both are cylinder shapes) but cannot figure out how to create the hole from the top of the 0.9 inch cylinder so that the 0.2 inch cylinder hole does not go entirely through the 0.9 inch cylinder hole. If anyone can help me out I would really appreciate it! Thank you so much. 


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