Can you get out safely? If not look up refuge or women's aid for support. Also, if it won't be safe make as many plans as possible before informing husband of the decision.
Check out the women winning divorce podcast or Facebook group! https://womenwinningdivorce.com/
I'm so sorry. Be gentle with yourself. You may have mixed feelings. Just allow yourself to feel them. Don't judge them. Sending you hugs ❤️