There is some great info on the net. Below are some links to some excellent articles from respected sources.
6 Ways to Beat Social Anxiety. www.quickanddirtytips.com/health-fitness/prevention/mental-health/sometimes-i-just-want-to-be-alone%E2%80%94is-that-normal-part-2?page=1
Depression in Teens. The Warning Signs and How to help them through it. www.heysigmund.com/depression-teens-warning-signs-help/
Anxiety in Teens. How to Help a Teenager Deal with Anxiety.www.heysigmund.com/anxiety-in-teens/
How to stop Overacting to the Small Stuff. www.psychologytoday.com/au/blog/your-emotional-meter/201808/how-stop-overreacting-the-small-stuff
Elizabeth Gilbert on Love, Loss, and How to Move Through Grief as Grief Moves Through You. www.brainpickings.org/2018/10/17/elizabeth-gilbert-ted-podcast-love-loss/?fbclid=IwAR2YylHajRy15yzugwVa9jy-40vQLb7P-bElMFGV0PkaXpF3TbEQ9JTAcyk
Social anxiety: How to rewire your confidence.bigthink.com/how-to-overcome-social-anxiety?rebelltitem=1#rebelltitem1