I kind of agree with bwtr. You have to start somewhere, and that is on the operating instructions: where to access the tools, what they actually do and how to use them. You go to forums for clarification, lest you'd be accused of not doing your homework first, or being too lazy to dig deep. It also depends on the app. SketchUp is probably the only app where I didn't have to read anything. As easy as Hexagon seemed it was in the demos, I had a hard time figuring out the workflow's sequence, whether to pick that one first or this one before anything got executed. It also took time for me to figure the use of the Ctrl key.
One thing that I probably never be be able to figure, though, is how to set a VCR to record programs at a certain time and date even if I had read the manual for the nth time.