These are very good questions that you raise. I encourage you to talk to a social worker at your county social services department. They should be able to hook you up with the appropriate resources.
I also encourage you r daughter to contact a social security office in your area and ask about applying for Disability. This can be a lengthy process and she should start now.l
You and your daughter should go to social services together to ask about resources. Many areas have programs or services for people with mental illnesses like OCD. She needs to get outside support started as soon as possible. You are very wise to want her to this support now.