I'm not sure whether Berklee is worth it or not -- who knows? For sure, though, the yawning shortcoming for many journeyman composers is not "do you know how to voice that chord" but all the other stuff.
Put another way, it's not "what's the cheapest and fastest means of learning what you need to know to be a composer?" You can watch 100,000 hours of Youtube but still get absolutely nowhere.
It's All That Other Stuff
Here are some things we all need to learn or we will fail:
- Can you get along with people generally?
- Can you navigate the treacherous feedback sessions with producers / directors / senior composers who may not agree with you and may tell you after the weeks of work you just put in -- "it's time to start all over"?
- Can you give directions to players speedily and accurately, without getting irritated or insulting them (on purpose or accidentally)?
- Do you know enough musical terminology and theory so that, when the French Horn section at a major studio -- seriously amazing players -- asks you, "do you really want that chord like that?" you can give them an accurate, polite, and efficient answer?
- Can you "booth" a session so it moves fast, but without letting uncorrectable problems slip by you?
- What, during the intense pressure of scoring, is a good joke that helps everyone relax and keep going, and what is -- not? The players are under pressure too, don't forget.
- Do you know how to talk to the engineer / conductor / Pro Tools operator in such a way that you communicate you're on the same team, and not as though you think you're the Second Coming of Richard Strauss so that they say to themselves "ah -- one of those guys?"
I don't know how people learn this list ^^ without either being lucky enough to be able to work at professional sessions or going to a school that helps you reduce the symptoms of insecurity, vanity, and touchiness that frequently accompany wanting to be a composer.
If you want to make it in any freelance field like this, it's not usually an inability to write a melody that trips up a career or stops it before it gets going. It's all this other stuff.
For most, it's either school or hope you have a cousin who can invite you to scoring sessions for a year or so, and hire you to do something there.