Welcome!
If you have not already, check the Facebook groups GTA Fist owners club and ST's of Ontario. Two amazing group.
No matter what you do, change the Rear Motor Mount. Doesn't matter which one you choose (though I recommend the AWR from Whoosh as it's cheap and very good), you just absolutely need to get rid of that stock crap ASAP. You'll see a huge difference in driveability even stock. Afterwards, even though I don't have it yet, I recommend a short shifter.
Anything after that is almost useless without a Cobb AccessPort, so get yourself one.