Below are some websites offering online resources that you may find helpful:
Self help: https://getselfhelp.co.uk/self-help/
Self help: https://www.cci.health.wa.gov.au/Resources/Looking-After-Yourself
Self help: https://www.nhs.uk/every-mind-matters/
MIND mental health charity: https://www.mind.org.uk/
NHS mental health web pages: https://www.nhs.uk/mental-health/