I know where you're coming from. I'm struggling with machine quilting but getting better with practice. I bought a machine large enough to handle larger quilts. But for my bed (King) I always send to a longarmer.
As for books- I haven't bought any and got rid of most of mine. Haven't missed one. There are so many things on the internet and tutorials etc. No mags either.
Machine quilting is all about practicing. Good luck!