Bit to stressful for autos. topping can be done with some practice but mainlining is a bit more involved.
If you have extra seeds though give it a shot.
Good Luck
As a beginner i would just leavr that stuff alone and first gain qome experience with normal shaped plants , you wil have a lot higher yield in the end , and not and up with tiny excuses of plants that yield 15 grams like a lot of new peeps do