Myself, I'd start with a motor, a servo, a wheel/tire upgrade, some +4mm axles, or +4mm brass hexes to widen the track width, and some brass steering knuckles. I'd try that out and go from there.

Here's a good wheel and tire combo.www.amazon.com/Pro-line-Racing-Mounted-Impulse-PRO1019410/dp/B09KT4RN28

I second what SirSCX24 was saying, Injora has some decent parts at decent prices.

Here's their 050 motor and mounting plate upgrade.https://www.amazon.com/INJORA-AXI00002-AXI00001-AXI90081-AXI00004/dp/B09NLMN52J

They have several choices of shocks. Here's an examplehttps://www.amazon.com/INJORA-Absorber-Adjustable-Assembled-4Pcs%EF%BC%88Black%EF%BC%86Red%EF%BC%89/dp/B08XLF96L7

Here's a good servo. You can use your stock tray with a slight mod, or Injora makes one for the Emax servo.https://www.amazon.com/Motor-Drive-ES08MA-Seconds-Analog/dp/B08FWYV2Y7