There is no spell to make someone a good witch, to be a good witch you need to practice, this being sense you said you are newbie, you shouldn't start off with spells, you should start off with reading...Witchcraft has many stories behind it, but only a limited amount of those stories are considered true.
Also learning what magick really is and how it work is really important...how to center and ground energy, and many of other important knowledge is important to read about, you can find some of that stuff in the articles (also beware that there are quite a number of fantasy articles aswell as spells).
You can also search up on the forums if you wish, you can find AwakeTooLong's The Basics: Expanded is on the General Info. Under the Spell Casting category. As well as Starries' Starting Out (on the same forum).
Anyways if you wish to know something about Witchcraft I can link you to some really good sites.