I have a decently big online following (~40,000). This includes a blog, YouTube channel, Etsy, and other social media. My biggest thing is writing articles and blog posts, among some other content such as videos and graphic design work, specifically for students. All under my pseudonym.
However, I also write for newspapers, magazines, and have an internship running a website and creating content for my college's Academic Support Center that includes this writing as well as some graphic design work. All under my real name.
I want to separate the two because my blog is slightly personal (which has helped me accrue my following) and thus potentially bias-inducing if professionals could find it. But good work is still good work. So I'd like to repost certain works from my blog into a more professional portfolio that can be accessed under my real name, without mention of my online pseudonym.
Would it be considered plagiarism if I reposted (or updated/adapted) my blog work for work I can put in a professional portfolio? Or are there any other concerns I should have?
For context, I'm an undergraduate student soon to be graduating. Meaning I want to add some sort of portfolio to my LinkedIn.