MUST HAVES:
As you stated: Brake fluid, track pads, helmet.
Not upgrades but essentials: extra oil, fluids, windshield cleaner, blue tape, tools, torque wrench, quality tire gauge, bottled water.
NICE-TO-HAVES:
Next upgrades: Tires, brake ducts, proper alignment (CC plates), watts link. <== probably in that order.
After that: More seat times, lighter wheels, safety harness, better seats, sway bars
As you stated: Brake fluid, track pads, helmet.
Not upgrades but essentials: extra oil, fluids, windshield cleaner, blue tape, tools, torque wrench, quality tire gauge, bottled water.
NICE-TO-HAVES:
Next upgrades: Tires, brake ducts, proper alignment (CC plates), watts link. <== probably in that order.
After that: More seat times, lighter wheels, safety harness, better seats, sway bars