And basically something without privacy unfriendly bloatware (like Ubuntu).
Can you give a little bit more context on this? For what bloatware are you talking about? Ubuntu comes with a variety of open-source programs, some of which you can choose to not install during setup. It does provide full disk encryption.
Look, it isn't as privacy friendly as Tails or Whonix, but it is friendly in the sense that it doesn't spy on you by default (as in Windows).
When it comes to security, use a reputable distro with large community. That's why I use Ubuntu (and because I've used to it). If your computer doesn't fulfill the resource requirements, consider using the alternative Xubuntu, which is requires less resources.