I did some digging and apparently it doesnt matter where your links come form, whether its related in your niche or not. Although there is a heavier weight on links related to your niche, but backlinks to your site aint too bad either.
I am working as a freelancer and been searching on how to do backlinking since most employers are looking for providers that has training or knows how to do that. If you have any tutorial manual that I can download or a website, can you post it here. I am learning these things like SEO since this would be a big help for my job.