Yesterday we took it apart a little bit more. We took off top cover, gas tank, throttle, cute little muffler and heat sink / cylinder head (whatever the name of that component is, I have no idea) with lonely spark plug. Now it needs some more cleaning before we can move on with disassembly farther. Also, oil needs to be drained too. Here are pictures of the progress so far:
I may work some more on it on Monday 2020-01-20 around starting around 11am-12pm. Check the calendar if you have nothing to do on a holiday.