Side note - how the hell does one even get into racing? .
KC Kart Club
https://www.kckarting.com/ would be a good place to start. They should have kids stuff. Basically they start with Kids Karts ages 5-8 with a glorified weed whacker engine. It is a blast to watch. PM me if you need some advice or guidance.
It can get uber expensive. My son outgrew the local and regional racing so he ran shifter karts nationally and then he went to Europe. He had the talent to compete with guys driving today in Indy and F1 but It is a rich mans sport and Shiver Me Timbers Lumber Company saw it as a bottomless pit.
There is a "Race Dad" from Belgium (close friends with the Verstappan family) who was spending over 1m Euros a year on the boys kart program. They would roll up to races in a rig that looked like it should be at the F1 track. 20 Motors, 20 chassis, 4 mechanics and a chef.
Kart Racing is the purest form of Motorsport- Ayrton Senna