I started a blog because I was answering the same questions over and over. Can I link to it - usually not on most forums (self-advertising). But I have the hopes that someone will also search in Google or maybe just find it.
A forum really requires a community - some people. If you don't think you can get that community, do a blog. A blog is a bit easier to maintain as well.
Not sure how many people will actually pay attention of course. I help on an advice forum and sometimes want to be very rude (but usually resist) to the characters who post a query adjacent to a sticky post on exactly the same topic.