Candle spells can be very easy or complicated. It all depends on how much time you want to put into a ritual. It can be as simple as lighting a green candle and chanting... money money come to me.
It can also be very long and complicated lasting several days with the repositioning of the candles each day. The choice is always yours.

The first thing you want to do is get the appropriate color candles for your peticular desire. Then you need to annoint the candle with oil. Olive oil will do fine. You need to rub the candle with the oil from the middle outward to the ends. As you are doing this you need to be thinking of your desired goal. Then sit and meditate on your desire after lighting the candles, then read your spell or chant your appropriate mantra.You don't need some elaborate spell with a bunch of big words or words you don't even know how to pronounce. You can make your own spells or rituals. Think of your desire then make a simple little rhyme that tells about your desire in it. It doesn't even have to rhyme. This is all about will power, the power of positive thinking, and creative visualization.
If you can do these things then you will send those vibrations out into the universe and eventualy they will materialize.