Here's a good checklist to go through:
- Will the track provide value to whoever downloads it?
- Does the track do something that's unique or seldom done in NL?
- Did you put enough effort into this track for it to be worth someone else's time?
- How much potential will posting this track have for improving your skills?
The answers don't necessarily have to be "yes", but they're something to think about. The last question is probably the most important one to consider.
Keep in mind that none of this is to deter you from sharing your work, should you wish to do so. They're just things to think about when uploading if you want to be serious about it.