Hi Bex,
Welcome to the Forum, it’s a great place to share your story and hopefully find some good advice and know that you are in a place with many people in the same situation.
My Son is an addict, alcohol and cocaine, he is doing ok at the moment, but I have lived with his addiction for over 10 years, it is very draining and like living in hell sometimes.
Your Brother could join Zoom meetings on line, AA, CA both do lots of meetings, do you think he would do this? Has he tried stopping drinking? The drink is usually the trigger for the cocaine, which is an evil drug.
He obviously wants to try and give up because he reached out to you, which is really good, hopefully he will try for both your sakes.
Read other stories on here, keep in touch on here.
Take care.
Dx