It took me quite a lot of time to overcome my impostor syndrome and submit my first forum post. It was a post summarising the past year of my work- which probably helped (Look at me, I worked a lot, maybe you will think I'm capable!)
However, I probably had valuable things to share before that, and you probably have too. We want more people to engage on the forum! (see first 3 videos here)
I found that writing my first comment, which was just saying thank you to someone who posted something I found valuable - induced a mental shift in me in terms of how I engaged with the forum. I started commenting some more afterwards and eventually wrote up my first forum post! (This is only the second one, and I'm still worried about how it will be received)
So if something is keeping you from engaging with the forum, be it impostor syndrome, shyness etc., I encourage you to try the following things, to see if it helps:
Some ideas, listed based on how scary they are:
1. Write "Thank you for posting this!" to a forum post you found valuable.
2. Ask a question from the author.
3. Write a forum post saying "Hey I'm Xy, and the purpose of this post is to get myself out there! My hope is that posting this (and surviving it) will make engaging on the forum less scary in the future!"
I realise that a lot of people doing 3) could be spammy for the forum, but I think it would be worth it if it helped people to engage more. Instead of upvoting these posts, we could write encouraging comments so they don't end up on the front page, but we still support those who wrote them! Maybe the forum could also have an "introductions" section, similar to what a lot of slack groups have.
I realise that even that was probably from some anonymous account so I can keep hidden(: