I’m a huge advocate of gardening. It gets you outdoors and active, gives a sense of achievement, you learn and improve over time, it’s popular enough that you can get involved in a community, if you’re growing veg it promotes healthy eating.
It should be mandatory.
In much the same way that almost no one has perfect physical health, almost no one has perfect mental health.
You don’t need to be a complete wreck to be able to benefit from paying attention to your mental wellness.
Eating well, regular exercise, mindfulness, forgiveness, good sleep practices are all worth practicing whether you feel unwell or not.