The manual that comes with the Lee press is a bit light. I would recommend you buy an additional manual. Lyman, Speer, Hornady, all are good. I have 4 manuals and always cross-reference them when I am developing a load. Information overload is not a bad thing when reloading.
I load a lot of 9mm. It is a great cartridge for reloading and there are a lot of powders and bullet combo's to try.
Unique, Universal and 231 have produced the best results for me in that cartridge. I lean toward Universal because it is clean and meters very well in my Lee powder measure.