Different things work for different people. But if you're living in your mother's house, you should respect her wishes in the matter, at least a bit. Also, have you ever asked her why she doesn't support it? Perhaps she has an actual reason, other than that you're a teen and she's your mom.
There are still spells and stuff you can do with things lying around your house, after all. And it takes no materials to bless something, only willpower.
My suggestion, overall, is to start small. Sometimes you can get teaching books from the library, so start there. There are also an abundance of resources on the internet. As for tools, there is almost always a substitution available. If you can't find a substitution, feel free to send me a message to ask!