And so it begins...

So, apparently I don't have enough to do and I thought it would be fun to start a blog.  I have no plans for this new endeavor, nor do I know what I am doing exactly... I guess I will be learning as I go.  I really am only starting a blog because I want to join a 2018 TBR Reading list contest.  And, being the competitive person I am, here goes nothing.
Although, I do have a couple questions.  What does one do with a blog?  What ideas do I have that I want to share?  How often do I post?  Is there a Having a Blog 101 class I can take?
Any and all recommendations would be greatly appreciated!