I have spent probably thousands of hours writing random responses helping people on forums, just because its the thing that I do to procrastinate. For example, this year I wrote more than 4000 posts on https://users.rust-lang.org/ and 19000 messages on the help channels in a few Discord servers. I'm probably the world expert at spotting the mistake in small snippets of Rust code at this point. I honestly wish I was a…
Forum discussions can be a mess of excess and ot information. You could easily cut and paste questions you've answered. (Sometimes modify them to fit how generic your answer is) Then copy paste your answer under it as well as useful bits from other peoples response.
Put links to topics and/or profiles with everything you "steal" to promote the forum.
Make tools to automate the process. You don't want to be muleing clip board back and forwards.
Just dump it into a post and save the draft if it isn't finished in 15 seconds.
Again: be consistent at it. If there is one post per day the visitor should be able to visit 1 time per day and find it. If it isn't there for 1-3 days - why bother?