Ok.

By vegging we mean when you start to grow, your plant needs to grow for a period before going to flowering cycle this early growth cycle is called vegitive growth your lights should be set to 24/7 or 18/6 longer light = faster growth. You then get your plants about half the size you want then start the flowering cycle usually 12/12. As for one plant, I do not recomend this. There is a 50/50 chance it will be male. Big risk and waste of time if it does come out male. I recomend 4 to start with and remove males when sex is known usually one week into flowering cycle.

Also it will help if you tell me aprox. cubic feet of space you are going to use