Now, I wish I had gotten started on this stuff before I even finished the darn book!
My advice to all aspiring authors: MAKE YOUR AUTHOR PAGES NOW OMG.
Seriously. Just because you're unpublished doesn't mean you're not an author. If you wrote a book, you're an author!
You're not an aspiring author; you're an undiscovered author, and the only way for you to get discovered is to put yourself out there!
So go forth, young authors! Make friends! Make connections!