What can you do? There are saints that have been in your shoes? I hope that those who read this post help to give names of these saints. My mind sticks on venerable Elizabetta. I read of her but can not retrieve it. She was married to a man and had 2 daughters. The husband left her and committed every sin that one could do. He even put a gun to her face and she was left in the streets. She never spoke bad of her husband. She prayed as a catholic would do and her daughters as well. She died and her husband came looking for her and saw that she had passed on. He became so sorrowful, that he confessed, became a clergy and his first Mass was for his wife.
So, what to do. First of all, a lot of prayer, and when you do, you are not alone. You take your angel and all the church militant with you and so you are all in prayer together. Offer special masses for the family. Don't have a false peace in the home. That is, don't back down on spiritual matters, hold your position. Some of the children might want to back out of daily rosary or mass and you say to them, I or we made a promise to give you the true Faith and that is just what we or I will do. Keep holy water in the house. If you are not near a church for real holy water have some one here on the forum, mail it to you. Have a priest bless your home, if you can. Bring alot of Christ into your Christmas. Sing as you make your cookies and trim the tree. Be yourself. Continue to educate yourself of Catholicism. You will find many ways to bring it into the family. Know the powers of prayer and Mass/sacraments, that is where the Precious Blood is. You can make a cake when the angels have their feast, a birthday cake for Our Lady and etc. Have Holy Calendars and pictures, candles and such when you pray.
If your husband is disinterested, continue prayer and have understanding, as one of the members have posted. If he ever comes around, he will be anxious to catch up and read books.
Your in prayer!