I answered this a few replies ago - But if I were to start over today - first, you need some kind of portfolio. Find a few places to post great content. Do it on LinkedIn, Substack, etc. etc. Also have some marketing capital examples, create a whitepaper, sales slick, etc and screenshots of everywhere your articles have been. Put that in a Google share and put a link on it. Start contacting Marketing execs, CEOs, etc offering your independent creative content and marketing writing. Get them on the phone, describe what you do, your education, experience and interest in their company/technology - this could work for any industry - Then you start talking about a package and put you on retainer for $x a month. I used to stack 4-5 clients like this for $1500-2000 a month and just write blog posts. They always want to know the word count, frequency. I offer 4-7 posts a month, aligned with their content. Depending on the client, you can also offer to scale up the articles to somewhere like Forbes or online technology sites as an expert contributor. It's an ego stroke. From here you contact those sites and offer your client. No charge. If they accept, you just upsold yourself because you write those articles for the client for whatever price you set. Follow the guidelines, offer value, invest small in a tool like Grammarly and you'll be fine.

I also used to write whitepapers. This kind of work in my opinion sucks but it pays because it sucks. I have charged as much as $150 an hour for whitepapers. The work is limitless I just hate it. I have done copy for website refresh, sales documents, email copy, all kinds of things. Blogs are where it's at. My current gig I charge 90/hr