I would look for a textbook that accompanies a stat software program. Andy Field has a series of books which cover regression at a understandable level (well, as understandable as possible; this does require some stats knowledge). I know he has a version to run regressions using both R and SPSS (different books). Having the full textbook explanation I think would be a better source for you as you figure this all out as well as a direct example of how to run the analysis in the specific program that you are using.
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