Anyone can set up a blog, and it can lead to amazing opportunities. Write about whatever you're an expert at, and market your work as widely as possible through social media. It could eventually lead to writing for traditional media outlets, speaking about your subject on the radio and TV, writing a book, setting up an online shop, or running workshops and e-courses in your field.
The same goes for Instagram accounts and YouTube channels, if your particular area of expertise lends itself better to the visual or the moving image. A lot of people are making a lot of money, and who says you can't be next? Just remember to find a niche, and be original.