Help with stage presence?

This is a pretty common issue with keyboardists, and there have been huge differences in how it was solved. You're stuck in one place so you have limited movement potential. But they all have one thing in common. It's all attitude. Ron Mael affects an uninterested, hostile stage presence. Nick Rhodes affects a somewhat dramatic androgynous robotic appearance. Others have solved the problem by using a keytar. But you look at someone like Geddy Lee, and he doesn't do anything about it other than just be Geddy Lee. Whatever you decide, it should fit with the core message of the band and you should be comfortable with it. If you decide your Aspergers is a defining trait for you, you should play that up however it seems logical.