Originally Posted by Motorstorm
... recording yourself hitting a random object like you would a drum can sometimes get you the sound you want once you've edited the sound then investing in percussion instruments
Thats pretty much how I started out. I used to hit everthing, radiators, baths, barrells, pots and pans, all because I couldn't afford proper percussive instruments. And I'd like to think taking that approach has shaped my music style somewhat.
Being self-taught can have its advantages. I can't compare it being formally trained but having to learn by yourself can produce some quite individual stuff. If you want to sound like John Williams or James Horner, then a proper education is needed but I'm convinced a career making unconventional scores can also be achieved (I hope).