Welcome to the forum.
Having a lived experience of poor mental health is invaluable I believe. No matter what sort of experience you have it does mean we can more easily empathize with others going through their own journey. To know and understand the reasons that cause some people to try to hide their pain, frustration and feelings of worthlessness is priceless. No knowledge can show you what it feels like to be unwell.
Having said that I also believe the more we know about mental health the better off we are to combat this stuff. The 'aha' moment when your study and real life meet. I think it gives a person hope to get through and out of their situation.
In terms of specific learning there are a number of stand alone courses to further your professional development. I expect you can google some of these. Their is a short course called First Aid for Mental Health which I attended many years ago and is still going strong. Check some of the various web sites such as Lifeline and SANE and TAFE to see what they have to offer. I think you will be surprised at the variety offered.
Thank you for your interest in mental health. Please continue to post here if you find it helpful.