Advice requested, not IF related

I am moving back to Alabama on Sept 20th. This will probably make my children about a month behind in school. Also, we don't know exactly where we will be living permanently. I am trying to find out how I can home-school for at least this year as to not traumatize them so much. I have the ability to home school, but have no clue where to get started. I have done a little googling, but I'm asking for help from my teacher friends and fellow mothers or anyone else who has anything to tell me. I'm hoping to find something that is little to no cost. Any info would help, thank you.