Beyond Blue is an amazing Australian website filled with practical advice and solutions for children, teens and adults struggling with anxiety and depression.
Here is a link below to their page on Youth.
If you believe your child’s needs some assistance in this area please seek help early. Speak to your medical doctor. You may even find that there is some government funded assistance in the form of a Mental Health Plan. This is the case in Australia where a certain number of visits to see a psychologist are subsidized.
Here is another link to their pages of Fact Sheets
Wishing you and your child every success