>I don’t know which sites are sufficiently trustworthy that I won’t be whelmed with spyware.
Stick with a major distro and use their package manager to install applications and updates. If you choose to install software which is not managed by your distro’s package manager, then you assume the risk involved.
Major distros include:
Ubuntu
Centos
Debian
Gentoo
Arch
Redhat
Besides that, the biggest hangup right now in Linux has been the need for a Sudo password to install Darktable. Whoever installed Linux for me didn't tell me that password. Neither "password," "admin," or "linux" work. Sooo...
It's been frustrating and I'm really busy.
bkmk