It is unlikely you will be given Metformin, but if it is suggested you can always ask for 3 months on diet only. This seems to be the way GPs are going at the moment. My HbA1c was 53 and Metformin was never mentioned. It isn't a miracle drug and helps only to a limited extent. It is mainly an appetite suppressant.
Sadly, we have to be very careful with fruit, but berries are good (strawberries, raspberries, blueberries) in moderation - not a whole punnet at a time! If you get a meter you will see which ones are OK for you. They are best eaten with either cream or full fat yogurt as part of a meal rather than in-between snacks.