I hate to say it, but I don't think you are ready for a cycle yet. These are things you should know before even thinking about a cycle, let alone doing one. 1ml of winny is most likely 50mgs, depending on the brand/lab. Some make it 25mg per ml, I've even seen some that are 125mgs per ml. What is yours? And don't listen to the guy who sold you it, once every 3 days will do nothing but probably give you some acne because your hormones will be flying all over the place from the sporadic injections.
After reading all of this, I think you should check to make sure the products you got are legit. The guy who sold it sounds like a con man more than anything.