Hello Penagirl,
We want to help with these issues.
If you need to manage the storage on your iPhone, please check out this link, which explains how to do that: How to check the storage on your iPhone and iPad
How iOS and iPadOS optimize storage
If your device is low on storage, it automatically frees up space while installing an app, updating iOS or iPadOS, downloading music, recording videos, and more.
To make more storage available, your device may also remove items that can be downloaded again or aren't needed anymore. This includes things like apps that you don't use and the local cache for files in iCloud Drive. Your device also removes temporary files and clears the cache on your device.
To transfer files from your iPhone to your Mac, please ensure you're using the process outlined in this link, so we can make sure there aren't any issues there: Transfer files between your iPhone and your computer
To free up space on your Mac, please review this link, which will guide you through that process: Free up storage space on your Mac
You also mentioned having issues with iCloud; to help us better assist you, can you let us know more about what you're experiencing?
Thanks!