I use ethanol free gas in my mower. I’ve heard it’s stable for a year.

I tried sharpening once. But between my kids and wife I always manage to hit a rock, or brick, or toy. And that really messes up the blade. New blades are like $20-30, I don’t have to spend time sharpening them, and the old one is 100% recyclable. So I’ll spend $20 to save time.

Honestly just watched some you tube videos. But after the first time it’s pretty easy. Just change the oil, air filter, spark plug and blade.