+1 to buying a handy recorder. That solves all the issues at once.
1- Anyone can figure them out push the red button,
2- They have excellent mikes so there's the cost paid for right there. You'll pay the same for a USB mike.
3- Some like my DR 40 are 4 track so you can even overdub say music.
4- You easily dump them to your computer with drag and drop or import. Mine you can use the cable or just pull the SD card.
You would still want to use Audacity or Gold Wave to edit.
Gold Wave is free to try and only $50 for a lifetime purchase. It's my go to for simple editing.
For $100 you can buy Wave Lab elements but that's overly complicated.
Sony Sound forge is also easy to use.