Hello!
1/ The narrator thinks that her mother has zero knowledge about computers. Yes, her opinion changed.
2/She feels clueless because she doesn't know what her mom is talking about.
3/ I find that extract quite amusing because the fact that her mother knows more than her about computers is really surprising. Especially since she didn't know the basics at first.
4/It is based on the stereotype that older people don't know much about technologies.
5/My experience confound that cliché.
Even if some of the older people in my life don't know much about computers - for exemple, my mother who doesn't know what "Google" is-, a lot of people, who are older than me as well, know a lot more things then I do.
Knowledge and interests aren't always about age.
6/?? Je ne comprends pas la question, désolée.
Je te répondrais après si tu me l'expliques, évidemment.
