There are many different homeschool methods. Your first step is to decide which one is right for you.
When my family first started homeschooling, we began under a public school program. Granted, this was not considered homeschooling by the state.
Since I was the teacher, I had to figure out the best way to do it. I count this time as our first two years homeschooling.
Some people really like the idea of being under the direction of the school and the stability and backup it provided. We started out with this program, but ended up leaving it so that we could pick out the curriculum we desired. We also wanted to individualize the education for our children.
When you homeschool, you can decide to study an in depth topic whenever you like. If your child is having trouble with a certain subject, then you can take the time and help them figure it out.