I personally love Cheetahs, they're my favorite 'big cat' of Africa. I found a way to easily draw them as well
For basic Cheetah head (older tutorial but still helps):

For basic anatomy help with lines and circles:

Other:
- Cheetahs have short fur, save for when they're young
- Cheetahs have long flexible, skinny bodies for better maneuverability
- Cheetahs have large chests to house their lungs so they don't run out of breath too fast while chasing at such high speeds. and to help cool them down
- A Cheetahs' tear lines curve from inside of the eye (at tear duct) to end at the mouth
- A Cheetah's claws are nonretractable for better grip on the earth when chasing prey
- Cheetahs have long muscular tails that change from spots to stripes as a sort of rudder to help balance and guide them when running/turning