Install this simple little app called Storage Truth. It's very small and will install in very limited space. It will tell you how much space you actually have left for installing apps:
https://forums.androidcentral.com/e...pps/details?id=sa.storagetruth&token=oC4v7Okz
To make space you need to:
Delete some texts or emails. If you really have lots, this can help.
Delete or move photos and videos. Uninstall app updates.
Uninstall apps.
Clear cache files.
However, that will only make space temporarily as cache files will rebuild over time. Also, while clearing cache files won't hurt anything, they're there to speed up operation and should be left alone. Not recommended.
Android since v1.0. Linux since 2001.