Welcome and I'm so thrilled that you want to jump on board.
There are a couple of ways to do this depending on how much you want to help.
One way is to reply to some of the threads with your own advice. There are so many different topics and threads of people reaching out.
But of course the biggest way is becoming a Blue Voices member. This is helping to represent BeyondBlue whether it's about sharing your story, helping in projects etc. Feel free to go to this link to find out more: https://www.beyondblue.org.au/get-involved/bluevoices
Hope this helps,