so just got my 04 and im getting a invidia n1 single catback and a k&n intake but idk what i should do next any ideas?

 

Sell the n1 and buy another one would be my next thing to do lol. Most do that shortly but maybe you are ok with the awful drone that exhaust has.

 

Go get an alignment and take it to some track days or autocross events and learn how to drive your car before you wreck it.

 

Get a helmet and do some autox and get good tires if the ones on it are crap or low on tread.
And I agree- get rid of the Invidia, that thing sounds horrible. (unless you want your car to sound like a civic with a fart can)