Hi Diana K!
I have read all the other answers, and they are all very good. I almost thought they were enough, but hey, why not give another angle on it!
Even though I have a degree in music, I have to reluctantly agree that it is not totally necessary for every kind of producer. BUT-I have been in many recording sessions where for instance, the producer is trying to give the drummer some direction, and is saying, "We need a cymbal crash on that part where you go 'Bum bum bum, BAM' and the drummer doesn't know exactly what he means, and they play around for 10 minutes wasting money, and more importantly, wasting the energy flow. It would have been much easier if the producer said,"We need a cymbal crash on the 'and' of four." Can't get much clearer than that.
I think learning the language of music-fluently- can certainly not hurt you. It sure has gotten me a lot of work. I am fluent in regular classical notation, jazz notation, the Nashville "number system" and whatever!
When i played bass for Ray Charles, he would stop the band and say (for instance) "Bar 74, the third trumpet player missed the E-Flat." Pretty impressive for someone who had never seen the score. On the other hand, James Brown laughed at me when I sent music charts to him. He had no idea how to read or speak music. I guess when you are the celebrity, you can do what you want! (But he paid arrangers who did know that stuff)
--As far as you are concerned, I totally agree with the other answers: Get yourself a connection in a recording studio, and camp out 24 hrs a day. Soak in everything. Do it all. Learn to master the language of production, without question. Learn how to use plugins and equipment to modify the track. Delays, reverbs, compressors, etc.They are your tools. Solder cables, learn your microphones. Know your platforms: Logic, ProTools, etc. Don't use B-level platforms if you can help it. If producing is what you want to do, be a master. Masters get the work.
Also, if you want to compose music, understand fully how music affects the picture. Film music is not a stand-alone song. It only works when it makes the picture and story work. You can practice your craft by composing tracks. Not just pieces, or just beginnings,or just grooves, but fully finished, polished, buttoned up music tracks. Only 15 seconds long? Fine! Just finish them as if you were getting paid to finish them. When you have over fifty of these finished tracks, you'll realize that it is becoming easier to express the idea that is in your head, or your client's head. At first you'll just be lucky to finish, but as you keep doing them, you will be able to change the mood if necessary, or modify the music in many ways. It's very common for the record label or your film director to want changes. Don't freeze! Learn how to accomodate them, and make changes that they describe in non-musical terms like,"Make that part 'much hipper,'" or "more fun," or "more evil and threatening." Lots of practice composing will give you confidence in how to do that.
Many times, you will hear someone tell you all the reasons the track isn't quite perfect before they play it for you. That is a sign of an amateur. Become a pro by seeing yourself as a pro, and doing whatever you can to deliver like a pro. Before I got jobs composing for the London Symphony Orchestra, or remixing a Destiny's Child track for a McDonalds commercial, or getting hired as a staff composer fr a TV series, I would video record movies, like James Bond or something, erase the sound, and write a new music score to that scene. Excellent practice!
Good luck to you. Wanting and talking are important, but doing, doing, and re-doing will get you where you want to go!
This shouldn't be a short ending cause it is so important, but I can't stress enough that you will also understand how to set your rates, get paid, not get cheated, get songwriting royalties, musician re-use payments, etc. If you are doing this for a living, you need to be fairly and properly paid. Pay attention to the business part when you are around a studio. Ask questions about how to do business well and properly. Fill out the paperwork! Someday it will be nice to receive royalty payments for a track you wrote 15 years before!