Sleep disturbance can be frustrating. Often, and where possible, addressing your sleep first can help with dealing with other areas in your life.
A great app for adolescents from the Black Dog Institute
https://www.blackdoginstitute.org.au/research-projects/sleep-ninja/
https://apps.apple.com/au/app/sleep-ninja/id1667400428
https://play.google.com/store/apps/details?id=au.org.blackdoginstitute.snf
General information and worksheets from the Centre of Clinical Interventions: https://www.cci.health.wa.gov.au/Resources/Looking-After-Yourself/Sleep