I've had a surprising amount of emails/notes about how to break in. I have no specific answer other than keep drawing and posting and creating. But here are some other random thoughts.
First, you don't actually 'break' in. You creep in. It's like you knocked on a door and they opened it, just a little, and you can see all the cool stuff inside but you're not getting in yet.
The hardest part isn't you first job. It's your second and third and fourth. The hardest thing in comics is getting MORE work, not your first thing. In the grand scheme of things your first job (creeping in) is piss easy. Cultivating a career is difficult. A lot of it has to do with timing and a strong work ethic. Not being a dick is also a big part of it.
I've been working steady for 5 years professionally (hired by major companies) but i still don't really feel secure in my career.
I'm not a recognized name or a big player yet i make a living doing this. So it is possible for this to sustain you.