To learn about Conservatorship for adults with disabilities, a great place to start is
Principles: Conservatorship of Persons with Disabilities from Disability Rights California. (Disability Rights California (DRC) is a nonprofit organization founded in 1978 that defends, advances, and strengthens the rights and opportunities of people with disabilities)
Special Needs Law Group has a short description of limited conservatorships.
Dale Law Firm offers a playlist of videos on the topic of conservatorship on youtube.
When ready to move forward finding representation, most law firms offer a free initial consultation to help families find the right fit for their situation. One place that families can search for lawyers that specialize in Conservatorship and Guardianship is https://www.lawyers.com/