When I started felting it was extreamly intimidating. I read but everyone had a different way to felt. Different terminology. So I just gave it a try and found it interesting but really had to do several items before I realized that there were 3 stages of a process you go thru
Wetting, friction and then fulling( shrinking). So to put it easier I would tell a new by that you start gently till the strength of the wool locks thru the three processes.
Actually I think any person new at this should accomplish a ball. When you are makeing a ball in your hands you are feeling the fragile soft to the rolling hard and you will feel the process happening.
Happy Felting my friends.