Writers have full schedules. And that includes marketing yourself and your skills. Luckily, you have plenty of tools available. And if you're even a TINY bit graphic savvy, Instagram is an easy platform you can use to accomplish those goals.
When you work as a freelancer, you focus on your craft. That makes sense. But you also have to devote part of your time to marketing and self-promotion. And that isn't always easy. Especially for those of us who identify as introverts. It's a learning process - one that doesn't get easier.