Building a niche site and links

I've found a few keywords that are not that competitive and made a niche site (hair care). Right now there are 2 pages with a small bit of content (around 200 words), but I'm planning to write more this week.

The problem I have now is that I have no idea how to build links to this niche. I don't want to submit the site here, or to reddit, out of fear of being called a spammer.

Are there any tools (something like google alerts) that help me find recent discussions about my niche, so that I can enter the discussion there?