A lot of developers focus on the build part because that's what they know best. Selling and marketing a new product is really hard and takes way more time than you think - unless you get lucky.

If you believe your SaaS can actually make money then you should continue but I would focus on outreach. Things like articles and online posts are fine to establish your credentials and make a potential customer comfortable paying but they aren't good for getting sales. I'm not sure I would spend time on SEO unless you already have a ton of experience with it - personally I think the combo of chatGPT and Google search getting worse made people use search engines less.

If I were you I would prioritize finding gig that pays and use your free time to market your SaaS.