Well the decision to homeschool for me was pretty easy since I was homeschooled as a kid. It definitely takes a lot of patience and quick thinking. I'm so happy to hear that your husband has finally agreed to let you try it. Ultimately you know what is best for your kids and you have to always remember that. There are going to be a lot of times where you are going to doubt yourself but you just need to keep plowing through those times.
Here is a really good website that will give you TONS of information and resources on the how, when, what, and whys of homeschooling.
A to Z Home's Cool
And of course if you have any questions or concerns I'm totally here for you. Even though I was home taught I find that teaching my own son has been a little frustrating at times and he's only 2 and a half. I just know it's gonna get more and more difficult the older he gets but I'm really looking forward to the challenge.