Those little M3 coupes are something else.....like a slot car, they handle like they can actually sense what you are thinking.
Coming from a W126 into that BMW is a real change, kind of like getting out of a truck and onto a motorcycle, almost.
So........ease into it, because you can get yourself into a LOT of trouble with a car like that, they really inspire confidence, they really go where you point them, they are so quick and handle so well, they could make you feel like you are a better driver than you are. They are REAL serious driver's cars, they not only look it but they deliver the goods.
You should seriously think about taking a high performance driving school like Bob Bondurant's, to get the full enjoyment out of a car like that.
Also, beware of jealous cops in Southern California. From the looks of the pictures it looks to me like you are running illegal tints on the front windows, and it's also against the law to run with no front plates in California. Better you heard this from us here, now, than from Johnny Law later on.
Good choice! Drive it safely.