I'm not (and old enough to be your Grandma anyway LOL) - and of course we have members all over in all age groups - but have you looked at Circle D or the DUK websites, and the 2017 Calendar of Forum Meets (which curiously are normally held in pubs!) on here, to see if any are anywhere near enough to you?
Circle D caters specifically for your age group - and when I was diagnosed at 22 if no suitable groups I'd have been tempted to look for a Parents of T1 children group and most likely wanted to go along there just as a warning to them what their own kids are going to turn into when they grow up! (My dad always said I certainly wasn't born with a silver spoon in my mouth, he reckoned mine must have been a wooden one)
Good luck and hope you enjoy whatever you find!