You need a TT helmet, skinsuit and aero overshoes to be as fast as possible so I'd get those and and some clip on bars for the madone and shave your legs!
After that you can start thinking about a TT frame, aero bars, disc wheel, which front wheel, what's the lowest crr tyre that fits the front wheel most aero dynamically, chain waxing, power meter, aero chainring covers, 1x, chainring size, oversize pulley wheels, aero derailleur covers......
You need a TT helmet, skinsuit and aero overshoes to be as fast as possible so I'd get those and and some clip on bars for the madone and shave your legs!
After that you can start thinking about a TT frame, aero bars, disc wheel, which front wheel, what's the lowest crr tyre that fits the front wheel most aero dynamically, chain waxing, power meter, aero chainring covers, 1x, chainring size, oversize pulley wheels, aero derailleur covers......