206 Casper Project

Hello 206 enthusiasts, I have a 1.4i 75hp 2001 automatic 206. I've had the car for three years, and there's nothing left to do cosmetically. I think it's time to get into the engine mechanics. Imagine a Casper (ghost) 206 that will be transformed into a joke car. What do you think should be done for this project, where should I start, and most importantly, where should the work be done? If there's an enthusiastic mechanic on the forum willing to help with this, it's a real treat. (I live on the European side of Istanbul.) I'll start with the air intake, downpipe, and software. What should I do next? Thanks in advance for your suggestions.

I forgot to add. Since the car is a four-speed automatic, my main expectation is torque. I don't care about top speed, but the car, in its current state, approaches 200 when I push the limits.