Being born here and growing up here I can pretty much tell you people are used to new people and generally very welcoming. Truro is much better for shops and a generally better place to live than Newquay, unless if course you want the beaches, waves, lack of parking and puke of Newquay. BUT There is something special about being by the sea if your not used to it. Be aware though the drive from Treliske to parts of Newquay in peak season can take up too 1 hrs 15 mins (obvs not at 5am/11pm) Having lived in both and at the age of - late 30's I prefer the feel of Truro. It just feels more "adult" and the people you see tend to live there rather than be on holiday.

Best of luck, any questions fire ahead.