I just got my 13 WRX 3 weeks ago and am new to manual too haha. Once I got the basics down (2-3 day) I pretty much learned the rest by just driving around. I hear the STi is a bit harder though since it's a double clutch?
Detailing and keeping clean, I wash my car with the two bucket system and hand waxed with Collinite 845. That is a very good winter sealant/wax. My car is black as well. Also the Turtle Wax Black Box is nice as well.
The base STi doesn't come with fogs? odd.