Enthusiasm is a good start...
...and if you'd like to be effective on a discussion board, learn to edit your writing. Editing and spell checking. Most writing can be improved by tight editing.
Start the post with a clear statement of the reason why, or what you expect responses to accomplish.
Then, give only a brief statement of the problem or conflict. Include relevant information so that folks don't have to ask (e.g., model number, part number, approximate year, location, size, etc.).
Finally, don't argue with folks who give you feedback that you didn't expect. Listen and learn to gain perspective.
Good luck.