Reference design

I have found an appropriate design to reference for my build

DIY RC Street Racing Car: One Week Classroom Project by Banana_Science

Modifications

Motor

The brushless motor utilized in this design is ill-suited, it's significantly too powerful and fast and will make the car too difficult to control and likely strip 3D printed gears.

I will test several DC motors to find a more balanced powertrain.

Power source

Making a DIY 2S 18650 by soldering is a major fire hazard, and we already have aces to plenty of 2s li-ion batteries. Batteries lesson

I will use a smaller battery

Gear box

When you change one thing, you will end up having to change other things it relies on and that rely on it.

As I am using a different motor, I will have to change the way it's mounted to the car and the gear ratio.

Bumper and tiers

I will use TPU for the bumpers and tiers

decorative shell

I will opt to make a decorative shell for my car