Not as bad as I expected
Except for the flowers, the bit about calling the next day, and insistence you pay, the advice wasn't that bad. *Sometimes* it's good to call the next day; usually it's best to wait a couple or 3 days. However, if you had sex or ate her out, you must call the next day if you plan on seeing her again, unless you've made other arrangements, e.g., in situtions in which you know one or the other would be unavailable.
I agree with Oscar, though. There are no real rules, although a man who's admittedly clueless oughta stic k to a set of rules until he develops a sense of what to do.
Movies sometimes work, too. I had a few movie first dates that ended up in bed. Two of them were even lousy date movies. Just touching arms together during the film got 'em warmed up and the rest was easy.
A lot depends upon your personal strengths, too. Set the date to play to your strengths.