Use a more general tag which will help other users identify the context of your situation. It is highly unlikely that you came across something which has never happened to anyone else and is more likely that you are trying to be a little too specific.
Other users will generally help with the correct tag use for new users as well.
Stack Overflow doesn't have a monopoly on experts. If you have a working solution which no one else provided, there is no reason why it will not be positively received. Everyone has to start somewhere and most users understand that reputation is not a measure of knowledge but of contribution.
Most questions do not need to be bountied in order to receive attention. However, questions are expected to follow certain guidelines to make them answerable and topical.
Granted, sometimes there are very hard edge case scenarios that may need a bounty to help them along, but for the most part questions will get enough attention to generate answers. New users get answers to their questions every minute on Stack Overflow.
And last but not least, Stack Overflow is not a forum