IOS 7 upgrade help iphone 5?

If i hold option and update to ios 7 will all my apps delete and if they do can i restore from my icloud backup? Is it safe? Can i update normally after? Anything else i should know? And will my Game Center be the same?

Actually no because it is not the final built you should not take a risk as i suppose you are not a developer and it is meant for developers and then also if you want that then go for it you data will be vanished

First, you need to backup your iPhone. Then register your UDID on http://www.instantudid.com/.It's only $5 and they registered mine instantly. Hold option and click "Restore" (this is the only safe way to do it), then once you're on iOS 7, restore from your backup to get everything back.