You're welcome
I've been using calibre for 4 years -- it gets easier to absorb the many features over time. I'm often glad that I'm not trying to take it all in once like a new user has to do. I also read these forums a lot -- goldmines of helpful info.
Welcome to MobileRead.
Edit: Some plugins have a clickable help button, but even if they don't, post #1 should always contain user help info (often under a 'spoiler' button) like this one does.