Blogging is expressing your opinions or thoughts on the internet through pictures, videos or content. Blogging can be of many types depending upon an individual. There are many ways by which you can start to blog:
Youtube:  You need to set up a YouTube account and start making good videos. You need to be consistent and innovative. Check out this article to increase Youtube views.
Instagram and Facebook: The basic requirement you need is followers. You can post pictures and short videos on Instagram.
Websites: You can create your own website using some platforms like wordpress, godaddy etc.