Ok, so, when trying to inflate something, if you only have your own lung power, take deep breaths all the way until you feel it in your gut, and blow steadily into what you are blowing up. If it does not have a way to automatically stop air from escaping to your best to close off the plug in between breaths to avoid letting the air escape.
In no time your blow up doll will be ready for... whatever you plan on doing with it.
In all seriousness, The US dollar has the backing of the US government, as long as the US has as much influence over the global economy as it does, we will not see out of control inflation. Inflation happens, some years it's a bit less, some years it's a bit more. It does not make sense to freak out about it, on it's own. Right now, we can pretty well trace the cause of the rise in price of some goods to compounding supply chain issues, triggered by COVID, though the root problems have existed for a while. That is important because the way to solve supply chain issues is way different than the way to solve uncontrolled inflation.