How do I edit my password for iCloud, when it keeps saying there's an error connecting to iCloud???

Hello, Ashleighyoo.

Thank you for visiting Apple Support Communities.

I understand that you are unable to edit your iCloud login information. Before you go through any of the steps that I suggest, make sure that all data is present on iCloud.com. I would then recommend completely signing out of iCloud on your device and then log back in.

Then sign out of iCloud on your iPhone, iPad, or iPod touch:

1. Tap Settings > iCloud on your iOS device.
2. Scroll down and tap Sign Out, then tap Sign Out to confirm. If you're using iOS 7 or earlier, tap Delete Account, then tap Delete to confirm.
3. Tap Keep on My [Device] or Delete from My [Device], and enter the password for your Apple ID. Your data remains in iCloud, and it will be updated on your device when you sign in to iCloud again.
4. If you're signed in on more than one device with this Apple ID, repeat steps 1-3 on each device.
5. Go to My Apple ID, and sign in again.
6. Change your Apple ID to the email address that you want to use. You'll need to verify the email address.
7. Tap Settings > iCloud on your iOS device, and sign in with your new Apple ID.

If you're asked for the password to your previous Apple ID in iCloud

Regards