1.Follow your choice
The very first and most important niche is always your choice. you must deeply think that which niche you like and do a good blogging for this niche as well. Always to start a blog with the topic you are having good command and comfort of writing as well. You do not need to do much effort with this as you already know many things about that. So when you are going to choose a niche always write on your choice and interest.