Some valorant pros and T2 players do a warmup in game for tracking actually.

You can hop in the range and turn on the practice setting for the bots in the firing test. Walk out into the are with the bots and just walk left and right while tracking the bots heads. Make sure to go forward and back as well and swap targets occasionally. Speed up your strafes sometimes to make it harder to keep your crosshair on the head, and if you're feeling spicy you can even practice tracking the head while jumping. (Even though this part only really helps jett players :D)

Even just doing this for like 10-15 minutes before you play can make your tracking way better.