Don't listen to the people who say it's "saturated". If your goal is 10K per month, you need 2-10 clients max.
Here is a method you can follow:
There is a trend I've been seeing on X & YouTube called "Design-as-a-subscription"
where clients would pay $500 to $10,000 monthly for "unlimited" design work. Clients subscribe, submit a design request, you work on the request, and deliver it. If they are satisfied, then they can submit another request. This method is not limited to design it can be done for copywriting, SEO, software development, and others. This guy: designjoy. co is an example of it working, making 1 million a year solo. Also, check endless .design, they are more advanced but see how they deliver value with the copy they use on the landing page.
The most important part is selling. If you can sell then you are golden. You can learn to do cold email outreach or do a JV with someone who can sell and split the revenue with them.
Pro tips: look for other agencies and ask them if they can offload their extra work. Look for startups that recently raised money, they will 100% need a rework of their site to a more fancy one.
Also, 99% of clients don't care if you are using Webflow, or Wordpress or you are coding it from scratch. If it looks good to them everything else doesn't matter, so don't mention it unless they ask or you are targeting clients that looking for specific platforms.
Good Luck.