Practise

“My fingers,” said Elizabeth, “do not move over this instrument in the masterly manner which I see so many women’s do. They have not the same force or rapidity, and do not produce the same expression. But then I have always supposed it to be my own fault – because I would not take the trouble of practising.  It is not that I do not believe my fingers as capable as any other woman’s of superior execution.” ^[1]

A musician gets out of a cab and asks “How do you get to Carnegie Hall?”

They are told “Practise, practise, practise”.  ^[2]

You can learn how to use Pressbooks, and use it well.  You will be able to help other folks.  You just need to practise, and be patient with yourself and the folks you will be helping.