You use the transmitter to control the buggy. There are two types of Transmitter. The most popular is the wheel transmitter. This uses a small wheel on one side of the transmitter to control the left and right steering. A trigger is then used for forward and brake. The other type of transmitter is the stick transmitter. This uses two sticks on the top to control the forward and brake and the left and right steering.
Receivers sit in the buggy and literally receive the signal from the transmitter to control the buggy.
It will take time for you to get used to either setup, but start off slow and in the middle of the track. Don’t worry about the racing line if you are a novice. The more practice you get, the faster you will find you can navigate the track and closer to the racing line you are able to drive.