So I downloaded Sigil, tried to open the epub file. Crashed and closed on me. Tried to open the pdf. That didn't work either, it's all just jarbled text.
I really have no idea why this is so hard for me to get to work. I was told I could just create the book in InDesign and export it. Isn't that the point? To design a book for print then when the client wants to sell it digitally, just export it? That's how it's advertised at least. (I wish it was that easy)