Hi there Jay, welcome to the forum.
Hope you're having better weather than we've had here recently
Presumably the reading you're giving is in mg/dL in which case that works out to be around 7 mmol/L (divide by 18) - which depending on whether you've just eaten or not, is on the high side of things.
As for diet, we have members of this forum doing well on something called the low GI diet and others who have found that reducing carbohydrate intake helps them manage their condition. Have a look at the recipes thread on the food forum for some ideas about what people are eating.
It is advisable that you get hold of your own BG meter and start monitoring your own reaction to the different foods you eat, using the results of your own tests you'll be able to find out a mixture of foods and portion sizes that work for you.
The bad news is that you are now a person with diabetes, the good news is that when you get your BG under control the chances of complications arising from diabetes will be reduced.
Stick around, this is a friendly place, and we are all more than willing to help when needed.
Regards, Tubs.