Don't you think that might be a little unfair to the people that have already upvoted it?

Oh, if you have several upvotes and don't want to affect that leave it.  It's not unreasonable to create a secondary intro post (have seen it done many times).  No one should bother you about that, just explain that now that you have learned some tips and tricks you want to provide a more thorough directive on your initiatives.  You can come at it from a specific angle such as a favorite hobby or topic (sport, cooking, photography, etc).  Use the tags 'introduceyourself' and 'introducemyself' - also 'verified' if you are able to post a selfie with Steemit sign, date and your username on it.  I never took advantage of those tips and probably missed out on a lot of follows.  But no worries and creating a second one, it makes good sense and people understand