Is my website name legal?

[Jake]

I have just purchased a domain as my first website, I recently turned 19 and don't have too much knowledge over the legal information involving the name of the site. My new website is http://www.seonorthsydney.com.au. I checked and don't think that "seo north sydney" is trademarked. So am I at risk of any legal action? I'm just starting out so this frightens me quite a lot. I don't think you can actually trademark a place or a broad term like "seo". So any info about whether I'm at legal risk would be great.
Cheers
Also its not like I am just cyber-squatting, I have the up most intention in maintaining and improving this website.