How do I overcome depression and anxiety without the help of experts?

Name: Arjun, Date of birth: 28 August 1999, Place of birth: Kolkata, Time: 8:00 AM. I have suffered from anxiety and emotional lows for years. I have heard of people who have said they cured themselves by journaling, meditating, and doing spiritual work. It sounds motivating, but can it happen? I've experimented with some of those things, but the emotional weight keeps coming back. Can you really overcome depression and anxiety without relying on medication or professionals? I don't oppose seeking professional help. I simply want to know if profound inner work and lifestyle adjustments can actually bring about enduring emotional freedom, or if that's merely wishful thinking.