Let me add my plea to those defeated by using the compiler.
I’ve spent a couple of days with the videos, the Interactive Tutorial, and the user forum, and I do believe understand the principles, but when I go to compile my very simple manuscript (written in Times New Roman 24) using one of the standard manuscript formats, it comes out unchanged in Times New Roman 24. (Yes, I am assigning section layouts to my one little section.)
There are other formatting changes (italics become underlining, etc), but the font type and size seem to be stuck. Just like me.
I’ve been using Scrivener for years, but have never tried to take on the compiler before. And with good reason!