I don’t know if Discourse is able to facilitate this, but would it be possible to permanently keep a topic like “Please Search Before Creating a Topic” pinned for TL0 and/or 1 members?
Having a topic like that appear on the top of the screen until new members have reached the next trust level might help them out and prevent others from having to post it over and over again as a reply.
Just thinking out loud.
Other basic information could be added as well.
I’ve searched for a request or idea like this, but nothing popped up.