Adding my twopennorth here.
Firstly the thing about being taught magic or wicca or any of the other paths is that you need to have a bit of common sense and maturity, much as I appreciate that you are a seeker there are way better places to be enquiring about teachers than yahoo answers. You would be dealing with a faceless person on a forum not even dedicated to the subject you wish to learn. So - for the first step why not look for online forums dedicated to Wicca/Witchcraft and paganism? Chances are you will find people on those that have far more experience and sense than half of YA seems to display :)
The other point is you can do a lot on your own, you don't need to get a teacher yet. Learn about all the paths not just one. For instance even within Wicca there is a lot of difference between the types, from all out initiatory path set within a coven, you are taught and initiated (and this version is very much about magic although it's not the main focus) to eclectic (taking source material from anywhere books/other religeons/etc) 'faery', 'seax' to hedge witchery (herbalist and very solitary based) there are also other earth based paths such as ceremonial magic, Traditional Witchcraft which is in no way related to Wicca, stregheria is basically the italian version of that - admittedly it is very ancient but some would insist that so is traditional witchcraft. Learn about all these paths. You can start online, you can ask which books are best, you can go outside and learn about nature all without ever coming near a teacher.
Another good source is your local occult store, they sometimes take a bit of finding but are often the hub of the local occult groups, you can look on such sites as Witchvox for local moots (that's meetings, usually a get together of the local pagan folks in an informal setting, sometimes with a speaker sometimes not)
Now regarding teachers, as well as what I've already said there are a few points you should bear in mind.
Reputable teachers will NOT take anyone under eighteen to teach, for preferenc older, this is especially true in coven based Wicca. If anyone says they will teach you without asking for information about yourself then they are not reputable. If you are a minor there are laws. If you are not a minor you still need to exercise common sense.
Don't take the first person who replies and says 'I will teach you' the whole point of this path is you take responsibility, those saying 'I will teach you' may well be looking for the status it would give them, not your best interests, it's far better to get to know the local pagan scene and then politely approach someone who you know and can trust. It's just plain daft to advertise on the internet asking for a teacher without seeing any of their work or them finding out a bit about you.
Learning over the internet is fraught with problems,many people use it as a resource, but as with Wicca and magic, the truth is in the experience not reading about it whether that's online or in a book, so get outdoors.
If you are underage then there are some groups that do distance learning via the mail, and you will need parental permission.
And most importantly - ask yourself why you want to learn about magic? Your other question asks if spells work, nothing about reverence for nature/dedication to a path/connection to divinity/connection to spirits - magic is not the be all and end all, it's not a quick fix and the answer to your problems.