My iPhone isn't letting me install apps, what should i do?

So my iPhone4 isn't letting me install apps. It's been happening for a couple days now. First I've noticed that instead of the "install" button, it's been a cloud with an arrow inside of it. Whenever I click it it says installing but on my home screen it'll just say waiting and i waiting a couple of hours & it won't work. I deleted some apps then tried again still didn't work. I also logged out the logged in again, s didn't work. Also it says my storage is full. That can't be because i deleted a lot of apps. I can't take pictures either. What's going on? What should i do?

You have been installing everything on iCloud, be careful every Gigabyte over and you will be charged $30 you should probably go to the actual apple store about it or seek help from them

Probably overload

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