All my iTunes downloaded music seems to have disappeared

Ever since the change to Apple Music, my library has disappeared. I've not tried to access it for a long time because I became discouraged. So I play Amazon Music on my Android phone but I can no longer enjoy my own music that I had downloaded from my own CDs and enjoyed on iTunes on my Apple Retina desktop computer. A small screen shows, randomly playing one song at a time, and I think they may be my songs, but I can't find the library listing so as to select what I want to listen to. I am 75 and not terribly computer savvy. How can I find library list of my songs?