Hi Carol,
Don't worry, everyone's a Newbie to start with! Do you have Roberts original marriage and death certificates? These are essential in tracing the correct Roberts birth. According to the census records Robert states he was born in Trowse, Norfolk. From what I can see the closest big town where his parents would have registered the birth was Norwich. It may be worth checking the births there. Often parents named their children after grand parents so this could be a clue to the names of Roberts parents as well.
While there is a lot of valuable info in the Ancestry trees there is also a lot of incorrect rubbish, always check the original sources. It will save you following a lot of false leads.
cheers Janine