There are hundreds of thousands of other web development businesses out there, so you need something to differentiate yourself.

Whether that's a great social media presence, better branding, or working in a niche then you need to focus on that.

Most of your business will initially be through your network so start talking to friends/family/contacts about the fact that you're looking to do some freelance development work. Chances are that you'll be able to get a job or two out of that.

As you get bigger and more experienced, you'll likely find that clients come back to you and refer you to others. That's your network providing organic growth.

I'm now working on freelance web dev amongst some other side projects so feel free to ping me an email to discuss if you want. My portfolio is https://codefox.io and email contact is there :)