I have been disappointed there aren't more good books on cycling. I used to run had more than a handful of books I recommended. I have all of the above, but maybe I was already "past" them by the time I read them. I'd even started outlining a book for beginners, but set it aside.

How is your balance on the bike? My sister has balance issues as a side effect of celiac, but feels very comfortable ON the bike, even when she is suffering otherwise.

I don't know your whole story, but I'd advise you to relax and stick with it. There are some new skills and muscles to build and nervous jitters just make it worse. My sis wouldn't cross roads or bridges at first, now she she launches off the trail to check out the scenery!