I've had the opportunity to home school all grades from pre-K to initial college by distance learning. Take a deep breath and repeat after me: your child will not end up illiterate and in the gutter because you chose the wrong spelling book in second grade.
OK, now take a look at the resources around you in an informal sense (and don't be impatient with me because I'm not jumping immediately to curriculum). Most people who are interested in home schooling already have the kind of home where reading and learning are respected and encouraged. This will go a long way to ensuring you will have a well-educated young man or woman, whatever you choose. Also, your church may have other homeschoolers who would love to help you. I found a children's librarian in our local facility who was terrific in giving me ideas to enhance our reading programs.
Regardless of your approach, for an overview, I'd suggest the What Your X-grader needs to know series:
Amazon.com: What Your Kindergartner Needs to Know: Preparing Your Child for a Lifetime of Learning (Core Knowledge Series) (9780385318419): E.D. Hirsch Jr.: Books They can give you great ideas and help you know if you are giving your child a well-rounded education.
Now take a look at yourself: are you someone who likes to figure things out on your own? Or do you like someone to tell you, here's a, b, c, now follow the directions? This will give you a starting point for the curriculum you want to consider. Depending on your personality, either approach can work. Just exploring the different websites will give you a sense for the different approaches out there. Others have already mentioned the companies that follow this all-in-one or eclectic approach. As you get to know yourself (and each child!) you can mix-and-match more freely on your own.
Part of me wants to suggest that you start with a school-in-the-box approach so you can be sure you cover your bases until you know what you like. If you are starting mid-stream, i.e., with an older student, a "boxed" grade is definitely a good idea to buy you a year or so to figure out what works for your family. I hesitate for a younger student because a more casual approach is fine and it may leave you feeling a bit overwhelmed getting six boxes of material in the mail and the accompanying sense that you have to spend 8 hours a day homeschooling a 5 year old.
BTW, I like C. Van Til's definition of Christian education (my paraphrase): you are teaching your children that there are covenant keepers and covenant breakers.