More machine than they needed for their little sidewalk and in our climate...didn't get used

I ran a camera (boroscope) into the fuel tank. looked good so I added gas, and it started up.
Wondering if there's a specific post-break-in check list that contains anything that really matters (dealer told them there was and yet they figure "it's too late now"..so they ask me lol).
Not sure what it could be. Maybe I'm just unfamiliar with them, but looks like an absolute service nightmare.
I'm their immediate neighbour and kind of an anything-that-uses gasoline uncertified mechanic. Frankly this is my first snow blower but severely unimpressed with design for being "top name brand". Diagrams show drive belts to be self adjusting tensioner, so not sure what else there is...?

Also serial number is 018430. Does that mean 2018 manufacturer date?