Now think of another band singing the same song but based on a different musical note. With sirens in the background. The point is that you should get intimate with your records. Memorize which ones are 33's and 45's. As you might have surmised by now, a musical background can steepen the learning curve.
Musicians tend to inherit a lot of feel for melody and rhythm.
If you haven't spent time chapping you lips on the reed of a school band clarinet, don't worry. Practice cures all. Above all, realize that your mixing will suck at first. Expect more train wrecks than a chronic-sponsored Amtrak convention. You may be a prodigy and get it down quicker, or it may take a little longer, but either way you'll eventually get half decent if you simply stick with it.