Motivate you? You need to do that yourself. Why should someone else motivate you if you are the one wanting to learn?
Many people on this site do not take on students due to the fact that personal experience is very important in magic. It is hard to be taught something if teacher and student live miles, states, or even countries apart.
Besides, if you want to know where to start I would suggest you search the forums for basics such as meditation, grounding, centering, visualization, and energy manipulation. That is where you begin. You can also read up on Paganism and see all the different sorts of paths to take and which one you feel is right for you.
Magic is not black or white. It is magic. What makes it "black" or "white" is the intention of the caster.
People on here will help with guiding you, but I doubt they will be a teacher. Also, most people on here do not spoon feed, which means help yourself first. Do all the research you can first. If it can be found in the forums, look there. If not research on the internet and if you are still unsure, then you can ask on here.
But of course, everyone has their own ways. From my time on here, this is what I have seen and I surely do not spoon feed, but I will help someone get started.
Hope this helps and good luck.