To ride a bike sit on saddle scoot away to give you forward motion, and then with your feet on the pedals continue to power yourself forward use the handlebars to steer and the break to stop.
Sounds easy but the first time you try it, you realise it is harder than any instructions will sound. Remember welding is a job that people get paid to do, because not all people can do it well. so don't be too sad if things don't look nice.

But here are some golden rules

Clean the weld area till you have shiny metal.
There should be a gap between the weld plates for better penetration, less distortion.
You €œdrag the rods along the weld€ About 70 deg to the horizontal but this always varies.
Gap between the rod tip and the weld is approximately 3-5mm
Try to weld on a horizontal plane so move the robot,
Make sure the welder cable will not snag as you traverse the welding portion.
Dry rods are important!
But like riding a bike it is practice.