I need space to take pics I already bought I cloud space

Note there's different kinds of "storage". Click on this link to "Learn the difference between your device and iCloud storage, ways to manage your space" and upgrading to iCloud+ if you need more --> https://support.apple.com/HT206504

Turn on optimization:

Optimization specifically with reference to "Set up and use iCloud Photos" - https://support.apple.com/HT204264

--> Save space on your device

iCloud Photos keeps all your photos and videos in their original, high-resolution version. You can save space on your device when you turn on Optimize Storage.

Manage your photo and video storage - "Learn how photos and videos use your iPhone, iPad, and iPod touch storage, ways to save space, and how to upgrade your iCloud storage if you’re running out."

https://support.apple.com/HT205703