Charis, You might want read my hubs on how I got started. I have only been writing seriously a short time so I am learning as well.
My hubs on writing talk about some of the things I faced when I began.
My best advice (and everyone who writes will tell you their own and all will be different) is to write, write and then write some more. Don't get discouraged, if you believe in what you are doing it will all come together.