Read "Posy is shit" at first. Anyways yeah he's awesome!

I usually just go to explainxkcd. Don't really know about an easier way. https://www.explainxkcd.com/wiki/index.php/691:_MicroSD

I personally use the community version as well because I don't trust avast but is there any evidence they are actually doing this?

Ctrl+V is already a shortcut for something (I don't even know what) but to paste just add shift so Ctrl+Shift+V.

(Also a beginner btw)