that is, telling him to join this forum to find basic info from bitcoin itself, after understanding it teaches very sensitive things to send / receive btc to fellow users
that's very basic in my opinion, the rest of what you say
I will do in the future , and I'm grateful that now my sister understands more about finding coins that can potentially benefit in the short term than me
So, I would say that keep that panic mode on at all times when you are dealing with crypto transactions, not during investments though because panic could make you lose money with bad investment decisions, only during transactions. That would make sure that you are doing the right thing at least and that’s why it matters so much.