J.L.
Abeka and Sonlight, are some of the more popular Christian curricula out there.
Time4Learning (www.time4learning.com) is a popular online program (no Christian affiliation at all) that will carry you from Pre-K to upper elementary.
Go to www.Christianbook.com and click on homeschool and you'll get a huge variety of the most widely used boxed homeschool curriculum out there.
www.hslda.org (click on about homeschooling and read through the entire section) will also have some good curriculum suggestions and tips on getting started, and most important finding a co-op or support group.
Next to finding a curriculum, joining a co-op/support group will be very important in helping you really see what homeschooling is like. Homeschooling pre-schoolers and homeschooling older elementary kids, while similar are really apples and oranges. I think meeting other families, especially those with kids in different grades or with differing needs is wise. While no two families homeschool alike, you WILL get a better inside view of what to expect, and how to handle common, inevitable challenges to come.
You will find, personality differences aren't really a challenge. Most kids find they really enjoy homeschooling and the flexibility it provides. Social activities and opportunity to meet other kids are not a problem if you find a good co-op or support group. However, I think most homeschool moms would agree the biggest challenge next to keeping organized is finding ways to accommodate differing learning styles when schooling more than one child. Seeing a veteran in action and hearing the sage advice of moms who have been there is invaluable and good way to ensure success with your own homeschool journey with your own family. Just remember, if you can remain flexible and open to changes as needed, and you avoid trying to make your homeschool like a bricks and mortar school (just won't happen) your family will thrive and be successful.
Another good idea is to attend your regional homeschool conference. They are usually in early Spring. You will get a chance to see the various curriculum vendors out there, meet other families, find a support group/co-op and attend workshops that will make getting started a breeze.
http://www.home-school.com/groups/KY.html
www.hslda.org
www.christianbook.com