0. If it meets the guidelines, this might make a good 'Show HN'. Show HN guidelines: https://news.ycombinator.com/showhn.html
1. To directly submit a link, leave the |text| field empty on the submit page.
2. Often there is little need to explain why a link was submitted because it is assumed that the person submitting it thought it was helpful or interesting.
3. But it is ok to add a regular comment after the story appears on the |new| page.
Good luck.