how can I restore my icloud connection

my storage is full

If you are talking about iPhone device storage, try to free up iPhone device storage see this Apple articles below:

If you need more space for an update on your iPhone, iPad, or iPod touch

If you need more space for an update on your iPhone, iPad, or iPod touch - Apple Support

How to check the storage on your iPhone, iPad and iPod touch

How to check the storage on your iPhone, iPad and iPod touch – Apple Support (UK)

Clear Other storage on your iPhone or iPad

Clear Other storage on your iPhone or iPad - Apple Support

-> What's the difference between device storage and iCloud storage?

What's the difference between device storage and iCloud storage? - Apple Support

my connection to icloud storage is not allowed

See this Apple article: How to use iCloud on iPhone

How to use iCloud on iPhone – Apple Support (UK)

You need to have good Service & Wi-Fi.

If they are On, turn Off Hotspot & VPN.