Well practice gives experience, thus more chance of success>>
I've done this dozens of times. I do recommend the rolling on a gnocchi board, back or front of a fork or even a sushi mat !
My "recipe":
One nuked yellow sweet potato (the less sweet kind- about 10 oz)
Let cool a bit then pass through ricer (Critical ! A grater just doesn't work as well). Let dry out & cool a bit so you can use less flour. Then add an egg yolk, 1/3 cup grated Parmesan cheese (or Dry Jack-available to me here in NorCal), about 3/4 cup flour. Less is better but the mass will get sticky as it sits. Use a light hand to knead just a bit. Break off some dough and roll out on floured wooden board like a cigar-width snake. Chop into 1/2 to 3/4 inch chunks. Roll with a floured thumb on the back of your ridging device (dinner fork?). you can check the web for videos showing this. Place on a Silpat lined baking sheet. You should get around 80-90 pieces. Let dry out about half hour then you can freeze separately and bag up. To cook in portions, boil some (2-3 qts) water, add a bit of salt and gently toss in one serving of gnocchi (20-23 pieces). When they rise to the surface simmer about 60-90 seconds more. (They take about the same amount of time as frozen ones. Just chuck in the frozen gnocchi straight from the freezer !) If you boil too vigorously they will fall apart. Fish out with a slotted spoon or spider if you have one and start on the next batch. My favorite way to serve is on top of my homemade meat sauce with a generous amount of grated Parm.