The Wicca forum on this site is informative. There are many sites on the internet that can help you. Some are not good, others are over simplified, and some give enough to get you 'started'. It may be difficult for you to learn or practice if you are a minor and living in your parents house. It can still be done, as many have a similar situation, but it becomes hard and complicated at times. You may be better off to wait until you are in a place of your own to practice and work now at study and learning of the path.
As you know your parents better than any of us do, it is a decision you will have to make for yourself. I do not recommend ever lying to them, I am a parent and nothing is more upsetting than having my kids lie to me, but I see no reason why you should come right out and tell them. I go with the "Don't ask, don't tell' policy. If they don't ask, don't tell. Yes, some consider this a lie by omission, *shrug*. As you are young and still learning it may come to pass that you find Wicca and magick are not the path for you. Take your time and learn, some of what is done in magick can be done in mundane ways that may or may not raise questions from your parents.