Code indentation should never use tabs, only spaces.

Make note of your friends phone numbers, emails and addresses (not just via social media), especially the ones from earlier years, and keep track of them with regular calls, notes or visits. Forty or fifty years from now, after the cycles of graduations, weddings, babies, moves, etc. you’ll have some golden relationships.

Joplin with a WebDAV server (for me it’s Infomaniak’s kDrive) provides syncing across multiple devices and is pretty much transparent. You should just force synchronize when leaving one of the apps to be sure (kind of like the save button in most programs).

Yes