generally TLP can do all of the above, so what I do is use powertop and tlp-stat for checking the current configuration, and tlp.conf for setting the configuration
Linux is a volunteer project (mostly). There is no "support" like a commercial os, you'll have to figure out your way around it yourself.
There are Linux User Groups (LUGs) around the world though, which are volunteer groups that help people with their Linux problems. Have a look at if you can find one around you
I'd love this, I think the biggest obstacle is beating the online converter sites on friction of use, but the automatic file type detection feels like a really good way to combat that
this makes me so happy for no reason