It's so very easy to start a blog. takes acouple of minutes and need cost nothing.
It is not so easy to keep it going; very few blogs last long.
You need to have something to say, that interets, informs and amuses others so they want to read it.
You need to think about how often you are going to post: post infrequently and poople stop follingyou, but posting for the sake of posting is even worse is your pots contains nothing worth reading.
What do you intend blogging about?