So if you know you are well versed in writing blogs, your writing skills are enough to attract few years. It all depends upon your content. So yeah, blogging or writing a blog can be a good option. The second I believe is online. You can if you are very good or expert in a particular subject. So there are many students who are in need of a teacher that can make them understand the concepts regarding their particular school subjects and it can also make you earn some money