Your mom does not need a degree. Did you know that in nationwide tests, homeschoolers consistently scored well above their schooled peers? The test scores revealed that the level of a parent's formal education had nothing to do with a child's test results. The scores were consistently high whether the parent had never finished high school or had attained an advanced college degree!
First, you must check the homeschooling laws in your state. I would also find a support group (other homeschooling families) to help you get started.
Support Groups and homeschooling laws for every state
Cafi Cohen is a woman who has successfully homeschooled her teenage children. She has lots of info for you and your mom to share about homeschooling during the teen years:
Here are some sites by other teenagers that might also help you: