Welcome screen for new users?

Thank you! @mcwumbly great question in terms of analysing the problem before choosing the solution! We fortunately have not had issues with user behavior, but we are expanding our audience and want to both improve the first impression/new user experience and mitigate risk when it comes to respectful discussions.
@merefield thank you for turning me toward the welcome topic. I do see a default welcome topic in our site texts, but I have just tried creating a new user, and the topic does not come up for me, nor can I find the text via search. I figured it may be disabled, but I also don’t seem to see a way to turn it on in site settings.

Any thoughts? (Also, where is it meant to appear when it is enabled?)
Thanks!