So here's the blunt truth: you're not all going to make it. (And by 'make it' I mean 'get published', but you knew that.) The numbers alone suggest that, because there are arguably more writers than there are book-buyers in every single market around the world. And most book-buyers don't buy lots of books each year.
Does that mean you shouldn't try? Of course not. The trying is the thing. The trying is what makes you a better writer. In the great ever-shifting ratio of talent:application that is the difference between getting published and not, application is the more influential component. There are lots of talented writers out there. The ones who 'make it' are usually the ones who keep trying and learning as they go. But not everyone will. And nor should everyone expect to.
My example, for comparative purposes, is this: not all musicians expect to get a record deal, so why do all writers expect to get a publishing deal? I am yet to come across a writer who says they're doing it for their own enjoyment - they all seem to want to get published - but there are lots of musicians who do it just for the love of music (I'm speaking from personal experience). It could just be the circles I run in. But those circles are crowded with people who are constantly disappointed because they haven't been published. Some of those people - many, perhaps - will now self-publish a digital book. What's going to happen if they don't turn out to be self-publishing superstars? Statistically, most won't. So then there will be more disappointment. And this disappointment is completely preventable, because the sole cause of disappointment is expectation.
So here’s what I’d tell you if you were my friend and I was your bossy agenty friend:
Write without expectations.
Write because you love it.
Write because you have a story to tell.
Write because it makes you feel alive.
Write because that's where you're most present, in the moment, in the flow.
Don't write because you want to get published.
Don't write and then focus all of your energies on getting published. Just use some of your energies, if that’s what you want to do, and keep writing with the rest of your energies.
Getting published is a separate enterprise - it's a different undertaking altogether to writing. There are some authors who will get published because that's just where their writing falls: in the publishable stream. It doesn't make it better or worse than the writing that doesn't get published. Quite often it's just about the planets aligning for that writer at that time. When I take on an author, I have to love the writing, yes, but I also have to think hard about whether or not I can get the author published. I've rejected a lot of manuscripts that I loved, just because I didn't think I could get them published. In my ideal World of Me, where all the writing I love gets published, things would be different. But they're not. I have to live in this world. And, as Buffy also once said, this world is 'hard, and bright, and violent'.
Now, in the words of Dan Savage, 'I'm gonna get so many caaaallllls ...'