definatly try a search, there is plenty of great info on here. but for now it does sound like your low end is too rich. this means that when you let off the throttle, the engine gets overloaded with fuel and cuts out. that means that you need to adjust the low speed needle to lean the mixture on the bottom end. but before you do that it may be a good idea to make sure your top end is properly tuned. its not unlike tuning the low end, you just adjust it so that the engine sounds crisp and clean on a full throttle run and you can still see a thin smoke trail. after you are sure the high speed is adjusted properly you can tune the low end so that it will idle reliably without bogging down or cutting out. tuning normally just comes from experience, so be patient.