Open Emacs and type C-h t (ctrl and h together and then t) that will open the emacs built in tutorial. Start going through it, then download one of the many cheatsheets and print it out and stick it somewhere you can see it from your desk.

Its quite a long learning curve, and I am still no expert, but its my favorite editor now. I cannot say its any better or worse than any of its rivals, but I put the time into learning it better than the others!