Some thoughts on sculpting....
I've been thinking about some of the best ways to improve sculpting skills and I'd have to say it's watching others sculpt and getting your hands in the clay.
When you watch others, you get an idea of the process and how it is done. It builds confidence to watch a piece come together. To see that they often look a bit alien or wonky at first...you just aren't finished yet (unless you are going for an alien.) You can see that there is a process that can be followed step by step, and even if you haven't sculpted before...it can be learned. I am living proof. I'll have to find some pictures of my early dolls and let you see my humble beginnings as well.
That is why I love to teach sculpting so much as well. I didn't know I could do this. And it's been so fun to discover and explore. I encourage you to keep going. If you love making dolls, or aspire to be a doll maker, get the proper teaching you need, and practice.
That takes us to the second point. Find time to sculpt each day if you can. If not daily then at least a few times a week. There can be many steps in creating a doll. But you can break it apart into just a little bit each day. Then as the days go by, a doll starts to take shape and come together before your eyes! It's truly an amazing process.
Anything you can make a daily habit can become powerful. If you don't feel like your hands in the clay today, then watch a video and learn a bit more instead. Most artists have put in hundreds and thousands of hours to perfect our art. But it happens day by day, and usually just because we want to be sculpting. It's enjoyable. And as time goes by, skill increases and the process becomes even more enjoyable as your pieces look more and more like you intended them to.