Okay, I'm sure several people are going to see this post (mine, not yours) and groan, only because it's been posted so many times...But, everytime I see a post like yours, I'm compelled to reply, and hopefully dispell part of the myth associated with first-time publishing. For novelists, vanities aren't the only way. They're not even a good way.
The message: Being a young and unpublished novelist only means you could probably benefit a great deal from finding an agent. Agents are busy people and they're playing the numbers game, too. Can't take every client that submits because there's only so many hours in a day. Can't do justice to every submission if you overload your client list.
The agent will hurry through (although it seems like it takes a decade for a reply) the submissions, maybe solicit feedback from others in the office, then take on the best prospects. They have to. They don't get paid unless they sell your work.
I submitted my first book at age 47. Signed with the second agent I came into contact with, and he sold the novel (supernatural epic) a few months later. My only prior writing experience was in the technical field. Moral of the story? Hell, if I can play the system, anyone can. Of course, it doesn't guarantee success. However, following the template sure raises your chances.
Don't fall into the vanity trap unless your only goal is to see your name on the cover of a book, you have a non-fiction niche subject, or you want to publish a volume of poetry. Vanity offers little or no future for novelists.
You may hear "one or two" stories of how someone self-pubbed and caught the attention of a traditional house. People hear this and think "OH WOW. A way in through the backdoor." The reason those examples are so often mentioned is because of the rarity with which this happens.
The reality is this...those "one or two, or even 10" vanity success stories pale in comparison to the numbers of first time authors who published the old fashioned way, through traditional houses. By the way, none of the vanity houses I know of send out review copies. You'll get perhaps a half dozen "author copies" that YOU order on an author-discount), then you're responsible for sending out those copies to reviewers. Talk about a long shot approach!