Everywhere, there are people / small businesses trying to create their own website who get stuck and need help. As a copywriter, you are the ideal person to help them, because you don’t just give them “a website”. With copywriting skills you can give them something which delivers their message powerfully. (The technical side of creating a website can be easily learned – just sign up for free accounts with Blogger, Wix, Weebly…and play around with them to get familiar.)
Theory #1: The mere act of publishing content on a regular basis does a lot of the "distribution" work for you -- if you consider search engines a distribution channel. (Which I do, considering how often people use them to find content.) If you create content on a regular basis that's informed by keyword research and optimized for search, Google takes care of the rest of your content distribution plan.
I got my first writing gig on Upwork, helping a guy rewrite some content for his ecolodge website. The pay was only about 5 bucks each, but after I’d helped him with a few pages and blog posts he asked me to help him respond to his customer reviews on TripAdvisor for $125. I’ve gotten a few more clients since then, and not one of them has come from my website; it’s all either been through Upwork (mostly small-time) or from talking to friends and family (much more profitable).
When tax season rolls around and people are Googling answers to their tax preparation questions, they stumble upon your blog posts, and realize you offer tax preparation services. Some of them keep doing their own tax preparation, but perhaps keep you in mind for next year; others throw their hands up in the air, decide to rid themselves of tax preparation headaches for good, and hire you -- because you're clearly way more qualified to do this than they are.
2. I also read a lot about SEO, CRO, and marketing in general, so I do my best to be a triple, or even a quadruple threat. Very recently I’ve done a 30-minute CRO consult with a client that *tripled* her checkout conversion (like, actually increased sales 3x), taking her from 5 figures per month to six figures per month in revenue. It definitely pays off to know how to do things that are related to copywriting. :)