It looks from that link you sent like your battery has a little PCB with a protection circuit in it, which is great news - it means you're far less likely to be able to do anything dangerous with it.
The real horror stories come from the drone batteries which don't have a protection circuit - it's then super easy to over-discharge them, which makes them swell up, or to accidentally short them when they'll be able to produce lots of current. I've been messing around with LiPos for ages and the only time anything has been a worry was when I was playing with an old laptop battery without protection.
As @AkosLukacs says I'd check the voltage on the battery just to be sure it's ok - the charger won't do anything if the battery voltage is out of range.
As for chargers, I'd have thought any standard LiPo charger would do. I've been using TP4056 based chargers recently though. For example: https://fluxworkshop.com/products/bgaa100126-tp405601a-lipo-battery-charging-micro-usb-blue
Some of those ones come with a battery protection circuit too - but you don't need that as there's one in your battery.
Just to add, if you need nice batteries locally you can always look at mobile phone batteries - some of those can be reasonably small (700mAh or so) and are in a nice case with protection circuit - especially with the Nokia ones you can just solder to the end of them.
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