Homeschooling doesn't involve you standing at the front of a room and telling your child all you know on a subject. There are a lot of homeschooling materials available, and many of them require very little work from the parent. You can have your child watch a certified teacher teach a class of "real" students and work along with the class. When she's a little bit older, there are options of computer-based learning and homeschooling text books that are designed for the student to read the instructional materials instead of being taught by an instructor.
If you want to homeschool, I'd encourage you to explore your options. You may be surprised at how easy it can be. I do a more parent-directed form of homeschooling, so I'm not really the person to tell exactly what all of your options are, but you might want to start by looking at Math U See, Bob Jones, and a Beka as options that would involve your DD learning from someone else. I'm sure there are other choices for her age, but I just don't know them all. CLASS (from Christian Liberty Press) probably has a good option. Switched On Schoolhouse is computer based starting at 3rd grade, but I think that their book-based version, Alpha Omega, has very little parental involvement and is available for younger ones.
I'm sure you're capable of teaching a young child. Teaching a classroom full of children from a variety of households is hard work which requires a college education. Teaching your own child who you know and love, with the assistance of well-developed homeschooling materials, is really very easy. It's the perfect time to start because you and she can both grow into it. If you decide as she gets older that it's not going to work any more, you can find another option, and maybe she'll be ready for things she's not ready for now, or you'll live somewhere with different options. Or maybe you'll realize that you can homeschool all the way through high school.
I know it's scary to think of homeschooling and "failing," but the beauty is that you can always change and tailor-fit things to suit your daughter with homeschooling. A caring parent who wants the best for her child will find good methods that work well for that child. And there is a lot of help available, even when you live in an area with few homeschoolers. There are Internet forums and books with so much good advice.
You don't have to raise the smartest child in the world. She doesn't have to win spelling bees, master calculus at 12, and speak Latin and Greek. Some homeschoolers do one or two of those things (none of them do them all), but many are just regular kids doing the best they can do. It sounds like she's not thriving in her current environment, so any improvement will be a step in the right direction. Yes, it's a little scarier when you're the one in the driver's seat, but the fact of the matter is that you need to provide a good education for her by the time she's 18 no matter how she gets it. If you send her to a "good" school but it doesn't work, then it's still not a good outcome.