Well done on getting some content published - its seems to be getting harder.
I am a big fan of Guest blogging, but not done for SEO purposes but for brand building.
If you are writing content where your potential customers are and they see your brand in a place they trust they are more likely to come and visit, or if they see you in the SERPs more likely to click on your link.
The link (if you get one), is just a second benefit - before the days of Google to get traffic to your site was to get links and mentions on other websites that was relevant to drive awareness of your site - I don't think anything has changed, just some people in the industry saw it as a way to cheat Google and was punished so its now seen as bad tatic - but if done correctly can drive some wonderful traffic to your site.
We do accept Guest post onto our blog, but this is down to the editors discretion but sometimes they can add some real value to our visitors - so it helps both parties.