People who've never been in a relationship should never try to give advice...Watch this thread
It's obviously personal opinion, but I would suggest that it's difficult to give relationship advice full stop. Unless you've been in that exact situation, with that exact person then it's difficult to give good, accurate advice beyond the obvious. There's so many variables, so much is context dependent, etc, etc.
In general though, no I wouldn't. Would you take advice on how to speak Spanish from someone who's never learnt a language?