I prefer WizTree over WinDirStat, but both tools can help to show whether you have a bunch of temporary/junk files taking up too much space, or if your actual data and program files that you really need are using up the space. 222GB (a 250GB drive) is considered the bare minimum these days, and you probably need an upgrade.
Screenshots of what you see would help make your descriptions more understandable, as well as information like the model of the drive. Is it an SSD or a mechanical drive? SSDs need a significant amount of free space to get full performance and some models can become unbearably slow when free space is as low as 10%, and Windows will be nearly unusable on any drive type with only 500MB of free space.
The capacity bar in File Explorer should have turned red when you got to 10% free, which would have been 22GB. Microsoft really should make that a more prominent warning, since it only pops up an actual warning message when you're down to 200MB free. Especially now that it defaults to showing Quick Access when you open File Explorer, so many users may never see My PC.
one thing that can bite you is the windows restore points
System Restore is not enabled by default in Windows 10 or 11. If it is enabled, it usually doesn't use the full amount that you permit. (Mine is permitted 11%, or 33GB, but uses only 11.5GB.) While the default permitted is a large amount of potential space used on really big drives, if you're using a drive as small as this and the entire SR space being used is a problem, then you really need to upgrade the drive instead of crippling SR. Reducing the SR usage would only be a stopgap measure because you're probably going to just fill up the drive again, and the amount that you're able to free up will not really be that large. Even getting back to 10% free won't make Windows stop warning about low space, nor will it restore the full performance of an SSD.