I have always used music to help me especially when I was depressed. In the early 2000's, I was very physically ill, unable to do much, and I just felt like giving up on life. I even stopped reading my Bible, praying and going to church.
I would pull out some of my old 60's and 70's music and listen to the sad songs. The I would feel prompted to listen to one Christian song, then another. Next thing you know, I was praising God, and slept like a baby.
In the end, I improved physically, but the depression and bitterness were still there. But God told me to read 5 Psalms a day. I did for a while, and God showed me amazing things about people and who he was! In the end, I found a good church, started exercising and went back to playing music in church, and it turned me right around.
Now, that is not the kind of depression you have, I know - mine was circumstantial. Although, I have been through tremendous pain the last year, when the meds failed, but God had helped me grow enough that I did not go through that deep horrible depression, like I did before.
I think listening to the right kind of music is not new age - find Christian music that offers hope in Christ. And try reading the psalms every day. I heard Billy Graham did that, which is part of what inspired me. And try to get to a church and make friends, although that may seem impossible right now. But make it a future goal.
As for healing, there are no promises in the Bible we will get healing, despite the twisting of the Bible by some groups. Instead, God promises us - HIM!
I do believe that you can improve but it will mean climbing out of that pit. And since it is too hard to do on your own, let us help you! That is what the body of Christ is for.
Praying and God bless!