as for "нормально", we usually say it when someone asks "как дела?"
-Как дела?
-нормально
as for "ну, ладно", we say it when we agree with something or somebody or it's also used when you finish your phone conversation or when you mean to say "пока"
People like to say "ну, давай" or "давай" Давай, покаHave you noticed that?