The goal of this clinical trial is to learn if a family support program helps Navajo parents and guardians of children with autism spectrum disorder (ASD) or other developmental concerns. The main questions it aims to answer are:

• Is the program something families find useful and easy to take part in?
• Does the program raise parents' knowledge and confidence in using strategies that support their child's development?
• Does the program help children improve in areas such as social communication?

Researchers will compare two groups:

• One group of parents will join the program right away.
• The other group will join the program after waiting.

Participants will:

• Be randomly placed into the "immediate" or "waitlist control" group using simple randomization.
• Take part in sessions led by trained Navajo Family Advisors, who are parents of children with ASD.
• Learn and practice strategies they can use at home to support their child
• Answer surveys about their experience, knowledge, and their child's progress

Inclusion Criteria:

• Parent/legal guardian of a child between 2 and 12 years of age.
• Child received a diagnosis of autism spectrum disorder (ASD) OR a developmental disability.
• Parent/guardian identifies as Navajo/Diné.

Exclusion Criteria:

• Parent/guardian is 17 years or younger.
• Child is 13 years or older.
• Child did not receive an ASD diagnosis or a developmental disability diagnosis.
• Parent/guardian does not identify as Navajo/Diné.

Given the policies from the Navajo Nation Human Research Review Board (NNHRRB), all data will go back and belong to the NNHRRB. Individual participant data will not be shared with other researchers for this study.