I recommend being careful about pinning topics. They tend to be ignored by regular users and often skipped by new users if there are a lot of them.
Something I’ve done on some sites and seen on others is to create a pinned index of useful threads (a form of FAQ, really). Even if they are ignored (which they often are), they don’t clutter up the flow of a board.
The real problem with just referring a new user to a thread is the amount of off-topic discussion and banter that just naturally happen over the course of a thread. Someone who is looking for an answer about stuffing brats isn’t always interested in reading 47 posts on what everyone thought about the 2019 Super Bowl. LOL