There's something else you need besides drive to make it in this industry. That's talent. It's true that once you get to a certain level it's a bit of a crap shoot. It's really hard to tell what book is going to be successful... but during the beginning... the getting published part... requires you to have a certain something. You can have all the desire in the world but that isn't going to get you what you want.
When I first started out w/my first book deal I was right out of college and only 22. I was eager to learn as much as I could but I also thought I had some things to share. I participated on a lot of chat groups for writers. Some people didn't like what I had to say. I got a lot of "You are young and just lucky." LUCKY stuck in my mind. What an awful thing to say! I think I've proven by now (I hope) that this, for me, is more than luck. I DO know what I'm doing! I'd say things like "A few spelling errors on a manuscript is not going to get you rejected by a publisher." I still think that's true. If you've got a great story and you make a few mistakes, I think they'll be overlooked! If you have a perfect MS and a terrible story, however, you will not get your work accepted... and I think that's what some people do not like to hear. How DARE this young person who can't spell and sent in a sloppy manuscript got published!
The lesson is this is that if you're a diamond in the rough, you will be discovered! Work at it and it'll happen. I pounded the pavement when I moved to NY and dropped off my portfolio to every big publisher I could think of while working a 7 dollar an hour job pricing paint brushes. I got a lot of great comments back when I picked up my portfolio... and a few criticisms... but soon enough I got a book deal. I've told others the same thing and for each of them it's eventually happened.
So, if you're good enough, you'll be found eventually.