Here’s a quick example of one approach:
Welcome to my forums, I invite you to [share a personal introduction](https://forums.example.org/new-topic?title=My%20Introduction&body=Hello%20%40maiki%2C%20allow%20me%20to%20introduce%20myself...&category=intro&tags=intro-topic).
That renders as:
Welcome to my forums, I invite you to share a personal introduction.
The link will open a new topic in the “intro” category, tagged with “intro-topic”. The body of the message will start with “Hello @maiki, allow me to introduce myself…”.
That way you include a link to create a new topic, and be notified by either being mentioned, or via tracking the appropriate category or tag. 