1. I just bought my own domain name and make numerous e-mail hosts. It is a few dollars a month, but well worth it.
When I was job hunting, I rolled out job@lastname.net, and when I no longer want recruiter e-mails I just delete the account.
8. I work diligently to turn off all Cloud stuff. Both Microsoft and Apple are very bad about automatically backing things up to their Cloud without permission. I do not use private Cloud though. It is not a lot of work to make multiple backups, as high-speed, high capacity removeable storage is cheap. I use SATA, but USB-C should be acceptable.
Same here! Avoid cloud at all costs. I have more removable storage (sata, usb) than a squirrel has nuts. I back up obsessively with a variety of devices.
Speaking of backup I strongly recommend getting a ham radio license.