Follow a line?
A line follower is the easiest way to make a robot follow a pre-determined path. You only need a way to move and a sensor to determine if the robot is on the line or not. There have been may algorithms developed to keep the robot on the line. The field of engineering that covers these algorithms is called control theory. During my 4th year college we made this project.
It takes a lot of courage to push through hard times.
Never Give Up. Good things are coming your way.
Niño M.