Hi Betsy!
You are in the right place. It’s great that he wants to get help and that he has been honest with you about it.
My partner has been using in secret for five years now, and is currently working hard at sobriety.
Some things that have helped is attending CA meetings, individual counselling and some podcasts and books on addiction.
He has also completely changed his routine to include more exercise and not drinking or being in a setting that he would have used in.
It isn’t easy to love someone who has lied, but only you can say whether you want to move forward with him or not.