Hi @benslinux Thanks for reaching out on becoming more involved.
@tmick lol. catching up now. 
Yes, there are two ways you can do this:
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For existing blog posts, you can share them in the blog articles category. However, similar to say Reddit, self-promotion isnât generally allowed if itâs reposting to a personal blog or too frequent. However, you write for 3rd party websites, so thatâs fine. Of course, we would rather not log in to the forums and see the last 5 new topics are blog posts only, haha. So, space them out like 1 or 2 a week at most.
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When a community member posts a review, or shares their home labs, or any other content rich post that fits the âLinux blogâ niche, I will often publish it to the blogâs front page. This way, more readers (including newsletter subscribers) can find/read it. For example @tmick post: My Search for a new Desktop environment
Since you are a professional content writer, if you would like to publish any exclusive Linux articles to linuxblog.io directly. Just send me a DM, I can set that up. The only restriction to this is that external links are vetted. Like many other online blogs, there are daily email requests for guest posts, but only if they are allowed to include certain external spam links.
So over the years, guest posts have been limited to either serious sponsors or writers who want to increase their reach and have avoided the âbut we need to include linksâ offers.
Oh, also, the showcase category can be used for sharing scripts, code, projects, personal websites, etc. However, these posts are rarely shared to the blog unless it fits the Linux niche closely.
I hope this helps and is flexible as far as options available!