Look for a woman in the program that has the kind of sobriety that you want. Someone who preferably has several years in the program, has worked all the steps, and truly lives the program.
Ask around at meetings for those who are available for sponsership. Talk to a chairperson at the meeting if they know who is available. People in the meetings will be more than happy to guide you in the right direction. Go to a women's only meeting and get to know the people in there, listen to them speak.
I found my sponser at a meeting that appointed temporary sponsers. He and I got to know each other, and he is my sponser today.
Good luck and God bless.