Composing and arranging music has nothing to do with whether you can go to the conservatory of music or not. If so, we can start from a higher level. What will happen in the future depends on your ability and hard work. You can watch some teaching videos online, which is the same as studying in the Conservatory of Music. I just met a good teacher in the Conservatory of Music, so I can explain it to you responsibly and avoid detours. It will be very helpful to give yourself a few years of technical skills directly. Through video learning, if you have strong self-study ability, this is not a problem. The key is to see if you can accept it.