Hello ! I'm new to the forum. I have several house plants, and I do a great job at keeping them healthy, but I have no idea how to prune them. I am especially concerned about my china doll. I know I need to prune it to keep it looking better, but I Don't know how to. It keeps growing taller so it looks kind of bare. I attached a picture. I'd appreciate it if anybody had any pointers. The base of the plant is 12 main stems all growing straight up, and it's about 2.5 ft tall.