Thank you for your good questions! I would probably use the impact calculator by The Life You Can Save, since I use it to introduce people to effective giving: https://www.thelifeyoucansave.org/impact-calculator/
The good thing with the impact calculator is that your family / friends can see the impact and compare charities. But it depends on their level of engagement. It might be overwhelming to compare charities. The Life You Can Save also have cause funds, so if they have any cause areas they might like more, you can suggest one of them. Otherwise it might be a good pick to just choose 1-5 of the charities at The Life You Can Save. One thing with that organization is that they only focus on global health, so if you prefer other cause areas GiveWell is better. I hope this helps!
it really depends on the type of person!
But this is something like what i do sometimes
things like impact calculators can be good for some people but not for most in my experience.Â
I don't think generic organizations like GiveWell are the best for most non EA people because they are one step removed from the people they are helping, but it all depends on the person!