So, I am currently setting up my blog site, and I can't seem to think of any topic that I can start on. It's actually my first time blogging, that's why I really need help in figuring out what will be the image of it. I'm hoping to make money from it. Any suggestions? Thank you!

P.S. I'm thinking of makeup reviews. I'm open to any suggestions though To those who already have a successful blog, any advice ? much appreciated!