In some belt drive record players, you can adjust the speed by pressing a button on the front and turning a screw near the tonearm.
You may take your belt drive record player to a repair shop if it does not have this feature.
Adjust the speed slowly to get used to the new setting on your belt drive record player.
After familiarizing yourself with the spinning speed, you can accelerate it. Keeping your speed under control can prevent your records from skipping.