How much will inflation affect the average guy?
It depends.
Are you someone who saves when you can, puts your money in things of actual worth that improve the lives of you and your family? Are you an adult who understands cause and effect and keeps track of your budget?
Or do you buy Funko Pops and Switch games to shove up your ass? Do you live in a bug hive and have other insects deliver your luxuries to you after purchasing them on the clicky-site? Do you keep track of your finances by checking your balance before swiping your magic card?
As the first, you'll see gas go up, something you experienced before, so you'll just cut down on your driving. You've seen groceries go up, so there will be less instant food and more cooking. Your utilities will go up, which just means turning off the air conditioner in the summer and putting on a sweater during the winter. You'll put aside extra money for the property tax, probably stop driving the extra car, keep lights off when you need to, and just buckle down and drive through it, because that's what adults do.
As the second, well, your life as you know it is over. Cheap Chinese junk will cost more. Your craft beer will cost more. Uber Eats and Door Dash will go through the roof. Your craft beer, lattes, and fast food will eat a huge chunk of your budget and you'll have to figure out what the weird square thing with the round parts on top next to your fridge does.
If you grew up in poverty, you'll be able to mitigate it. If you're in poverty, your food stamps will go up and you'll get less soda and instant food and instead go back to cooking.
If you grew up a bugman in a bughive, your life is over as the drones have their chocolate ration increased from 30mg to 20mg and their Funco Buttplug ration increased from 4 to 1 a month.