Welcome to the forum sis, and congrats on converting. May Allah increase you in piety and ease your affairs ameen.
Since your children are being raised as Muslims mashallah, I think you should start teaching them salaah and short surahs from the Quran. Children learn quite fast and retain the information for much longer than adults, so don't let them feel that what they are learning is difficult or unattainable just because it is in a different language. Teaching them will also teach you a lot as well. If you type "Quran for kids" in youtube, you will find a lot of great videos, but I do think that your support and interaction will do wonders in their learning process as well.
For books, try: Kalamullah
For some basic terms check out this thread: Basic Islamic terms
To learn the basics of arabic try: Madinah Arabic
I'm sure there are more resourceful members here who can suggest other helpful sources as well. And as always, you can always ask questions here on the forum.
***Lastly, I noticed your account is not activated yet. If you would like to have more access to the forum, you will need to activate your account by following the link in one of the emails that was sent out to you from islamicboard. If you have trouble activating your membership, make a thread in the helpdesk and inshallah one of the admins will assist you. :)