The NICE Guidance recommends Cognitive Behavioural Therapy (CBT), with a therapist, as the treatment with the largest evidence base. However, it is also possible to make progress through self-help CBT.
Please see these self-help links – An NHS self-help guide, Self-help books, Courses and practical help, Australia CCI – Self-help resources.
Note: Supported self-help – (also known as guided self-help) is self-directed learning of therapeutic tools or techniques alongside professional guidance from a mental health professional (such as a psychological wellbeing practitioner). The professional would check in regularly, either through sessions or feedback via phone or email, to discuss progress, address challenges, and adjust strategies as needed.