Welcome, Debra!
I actually studied Library Science in college and worked in a public library for a while, which was fun, but I agree that being a work at home mom would be much more fulfilling!
That's great that your husband is supportive and that your kids are excited to have you home - maybe they'll be willing to "help" with special projects.
Good to have you here - the members of this forum are very helpful and you're sure to find all the info you need to get up and running. Good luck!