SO many problems since the iOS 9.3 iPad update. Grrrrrr!

Since the update last night, these are the list of issues I can't seem to fix OR find answers to fix them:

1 - Can't log into iCloud.

I've already reset my wi fi network settings, did a force restart, and also changed my password on icloud.com. Nothing works.

Every time I put in my password, this keeps coming up "Verification Failed: There was an error connecting to apple ID server".

2 - Keep trying to get into "iTunes & App Store", from my iPad, but the every time I do, the iPad freezes up and I have to do a force restart.

3 - Can't restore iPad from iTunes because I can't get iCloud to work so I can't turn off "Find my iPad" in order to do a restore

4 - My whole iPad has slowed down to a bloody crawl and I'm constantly doing a force restart.'

What the HECK is going on with this update and my iPad????