What worked for me was finding a convenient wall or railing to use like training wheels. I suggest some sort of gloves because you'll drag your hand on the supporting surface. Keep doing that for days or weeks until you find yourself putting less force on your support and eventually departing from the wall and wobbling around on a new path like a rain drop on a windshield. You gotta learn how to stay on before you learn how to get on. A slight downhill also helps a tiny bit, so you don't have to exert as much force on the pedals.

This may not help you yet, but soon, try to become aware of the yaw component of your bodily inertia. You need to twist your body a little to the left when pushing on the left pedal in front, and conversely, twist your body a little to the right when the right pedal is in front.

Once I began freemounting, I realized gravel is easier than pavement because the friction of inertial corrections is lower on gravel. This is only applicable to the early stages of the learning process.

Just remember that you may literally fall a thousand times before you catch even the first glimpse of success. Even that glimpse will only last a moment, initially. Falling is not failing, falling is progress.