Personally, I would start with Energy working, Chakras, And all the basics and correspondences. This will help you in almost all magic(k) workings.
For candle magic(k) I would most defiantly learn the correspondences. Correspondences would be like colors (so that you know which colored candle means what), planets, days, lunar and solar phases, etc.
Candle magick is very cool, one of my favorites. Learn about how magick works by studying energy; how it flows and how to manipulate. This is important so you know what to do to empower your spells and magickal workings. Newbie central is good to show you about the site. Basics Extended in articles is a good read for beginners. Good luck, and welcome to SoM. Feel free to mail me, as I can point you in right direction, or answer if I can. Blessed Be...
I agree with Sue, to be honest where to start would be at the begin, start from learning the history, start with study, what is magick? How does magick work? Ethics, principles, responsibility. Start by mediating daily to help you with your focus. You need to study before you move on to casting spells. Also do some visualisation work, if you can't visualise something then your be having a few problem. Good luck with finding you magick, happy casting!