Hello! My name is***** will work diligently to provide accurate advice and information.
iCloud storage is used for items that are stored online such as documents, backups, synced data. It does not increase the storage space on the iPad itself where Apps are downloaded.
Under "STORAGE" make note of the amount used and the amount available. It's like the amount available is quite small in your case.
Tap Manage Storage and you will see a listing of your Apps and the amount of space they consume.
Tap on ones you no longer use and select "Delete App". to remove them.
If you have a lot of other content on the iPad such as music or videos then you may need to remove some of that, as well.
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Thanks and good luck,