How many photos and videos do you need for your storage?

I deleted half of my photos and videos and it still complains that my storage is full! My only question is how many photos and videos am I supposed to have until my storage doesn’t fill up again. If someone could tell me, that would help me so much because I’m raging that I stopped using my iPad for a while. My iPad would not let me do anything because it was glitching and would not let me download anymore. I checked my iCloud and I tried to delete things in it but still wouldn’t work that I had to delete it. Hopefully, I can get an answer so I can go back to go on my iPad normally again.