No matter how good you are, when you get to the professional world, you will be competing against thousands of people who are better. So, there is no "good" … there is no "good enough" … there's only the never-ending pursuit of being stronger. Start now.
Most people who "can't" move to L.A. ... or switch jobs ... or do the things necessary to break in ... simply don't want to. But make no mistake: THE CHOICE IS YOURS.
Agencies are the best starting place for anyone launching a Hollywood career… even if you don't want to be an agent. Many networks, studios, and producers won't even hire assistants who don't already have agency experience.
If screenwriting is not a "calling," if it's just something you've thought about trying when you have some spare time… then I say, "don't bother." Because you will be trampled by hordes of other screenwriters—of all ages—who want it more badly, and are willing to do more to get it, than you do.
The absolute best way to network in the industry... is to GET A JOB IN THE INDUSTRY. If you're not working in the industry, you stand almost no chance of breaking in.