Running a blog is not an easy task

I started a blog and I have to think a lot what to update, what can I write, will the reader is going to be satisfied?
There are many ideas ho my brain but there is not enough material for it. I know that most successful blogs have many contributors but I want to make it my personal blog.
After all this all I want to say that blogging is fun. But I also know that a reader somewhere in the world look for inspiration and make decisions basing on what someone wrote.