My advice would be to spend a few days learning Scala and familiarize yourself with the IDE. There are great resources online. Some of my favorite are:
The effort you put in learning Scala will pay off once you start working with Scalismo and Shape Modelling.
Regarding the shape model: Both the femur head and the pelvic bone are rather simple structure and modelling them should not be a big problem. I would maybe start with the femur head. But once you have one, adapting the code such that it also works for the other one will not be a big challenge.