My 2 cents
A full exhaust is pointless without a tune
Start with a full service, engine oil and filter, air fliter, transmission, diff, coolant, full brake flush
Possibly good street brake pads and quality tyres if required (quality tyres are essential)
Do the service yourself of you can, buy a good service manual, jack, stands, and tools, torque wrench, don't break stuff, take your time
Safety safety, always, always, never work on a car that is held up by the jack alone
For a little more "noise", as stated, just get some SS rear mufflers, easy bolt on, and cheap/free
Alway buy quality parts, do it right, do it once
Then, possibly new shocks if you still have the original shocks as they will probably be rooted, I wouldn't go lower than FE2 if you want to lower it a bit, lowering it too much can be a PITA in relation to handling ground clearance and compliance on a street car, you will need a wheel alignment
Doing this will be good for reliability, safety and you get to know your car
Getting it clean and serviced is priority No 1, focus on the basics
If your on your learners/P plates keep the car under the radar
Then save money to upgrade to a better car once your off your P plates, or, when you get your full licence put a turbo with all required supporting mods on it
Drive safe, don't break it
Cars are expensive