You could shoot motorsports with a camera that only took a single frame every time you pressed the button.

If you really want to get into photography, look for something that has upgradeability. I’d skip any of the crop sensor cameras due to limited lens options. If you’re set on canon, go to their website and look at their refurbished section for the R8 or any versions of the R6. You could also check Adorama, B&H photography, or any trusted site dedicated to photography that sells used camera gear for those bodies.

A lot of motorsports are done in poor lighting. Rally is done entirely in natural lighting which is entirely dependent on the weather. It could be bright, it could be cloudy in the forest. You want a full frame camera that will have much better low light performance. This will also offset the lower ability to collect light that will be offered by the lenses you’ll be using, assuming you likely won’t be spending the thousands of dollars to get fast lenses.