Mindfulness and Breathwork! Mindfulness is an incredibly valuable practice that can be a game changer for mental health and anxiety. Breathwork goes a long way as a fundamental technique.
There are a variety of free tier apps like InsightTimer that have beginner courses in meditation. Working to create space in your life between things like work and family give you breathing room. Starting to live in the moment allows you to step out of the anxiety of the past and worry of the future.