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I would turn and run if someone offered to build backlinks for $5. I would recommend trying to leverage the Fiverr community to illustrate some graphics for your content piece depending on what you are writing about.

Also, take a look at Thumbtack and Upwork you can hire some higher quality free lancers on those platforms to help create some high-quality content. I would invest a lot in creating quality content while looking for ways to leverage and amplify it to build backlinks rather than paying someone from Fiverr to do it.

Think about doing some research on influencers within your target market to amplify your content and build backlinks. Hope this helps you out some.

thumbtack

When doing reporting, I know we like to include engagement metrics such as goal conversions, pageviews, pages / session, time on site, bounce rate and goal conversion rate. I would also recommend including a break down of different sources referring traffic to your website such as organic, direct, social and referral.

For SEO purposes, I would segment the traffic by 'organic' traffic in whatever analytics tool you use and report on the top landing pages you optimized for. I would include metrics such as page views, and other engagement metrics like goal conversions, time on page, bounce rate etc.

When it comes to social media it's a little trickier I would recommend reporting on followers and other engagement metrics depending on the social platform. For example, on Facebook you could report on 'shares' and 'likes'. I would also highly recommend tagging any link you include in any social media post so you can better track traffic coming back to your website. Also, I would report on sessions on your website that directly come as a result of social media and you could include a breakdown of the specific social channels.

Unfortunately, I can't give you an excel spreadsheet of an internal report but that should be enough to help get you started.

When doing reporting I know we like to include reporting on engagement metric such as, goal conversions, pageviews, pages / session, time on site,  bounce rate and goal conversion rate.
I would also recommend including a break down of different sources referring traffic to your website such as organic, direct, social and referral. 
When it comes to social media it's a little trickier I would recommend reporting on follwers and other engagement metrics depending on the social platform. For example on Facebook you could report on 'shares' and 'likes'. I would also highly recommend tagging any link you include in any social media post so you can better track traffic coming back to your website. In addition, I would also report on sessions on your website that directly come as a result of social media and you could include a break down of specific social channel.