First of all congratulations on your first ride.
Can you plz mention the mileage of your car so that we guys can suggest you the best.
Also make sure to do basic maintenance like Engine oil, Transmission oil (CVT fluid), air & cabin filter replacement. Do inspect brakes, get the wheel Alignment & balancing done, inspect tyres etc
Make sure there should be no extra or free wiring hanging around in the engine bay or under the dashboard.
Rest you can't do much in performance upgradation.