I have always wanted to write a novel, but I don't know where to even start.
Well, a Novel is a relatively long work of narrative fiction, why don't you start with something shorter? 
Hmmm, that's a thought, but I really had my heart set on a novel, maybe romance.
 You mean a Novel about love and relationship?
Yes, exactly. Although, I'm not much of a romantic so maybe I should pick another genre. Any suggestions?
I like mistery.  Of course since Novels have been around for 2.000 years, there are all sort of genres.
I was curious about the difference between a novel and I've also heard the term "novella". Is that the same thing?
The Novella tends to be shorter than a Novel. it seems the name novel began to be used in the 18th century,.
I think I've chosen my genre thanks to you. I am going to write a mystery novel. I appreciate your help and insight.
Great!  I hope to read your novel soon! Maybe you will create the next Sherlock Homes, or Hercules Poirot!