Hi Andy,
Firstly, you need to ask for written details of your blood test. You can have a full print out but you have to ask. The 70+ sounds like you had an HbA1c test, which is an average of your blood glucose levels over the previous 2 to 3 months.
Well done on getting the meter. Use this to test your foods and meals and how they affect your levels by testing immediately before you eat and initially 2 hours after starting to eat. Set yourself an attainable target, and when you reach that target consistently, lower it.
The nurse should talk to you about diabetes, tell you to lose weight, and will advise on a diet. If she is anything like most diabetic nurses she will spout out the NHS guidelines for a healthy diet, telling you to eat plenty of carbs, cut down on fat, and other advice that is incorrect for diabetics. Your meal testing will soon show you that carbs, especially the starchy ones like potatoes, bread, rice, pasta, batter and pastry, will spike your readings to unacceptable levels. She will tell you to cut out sugar, cakes, biscuits, sweets and sugary drinks. That is good advice. However, she may not tell you that all carbs turn to sugar once in the system and most are equally as bad as refined sugar. You will learn this as you progress.
She should also test your feet for any loss of feeling or refer you to a podiatrist. Plus she should refer you for a routine retinal screening test. We have these annually or more often if necessary. So make sure your feet are clean with clean socks when you go!
She will then arrange a further review in probably 3 months time. She may also prescribe medication for you if she feels you need it. This is likely to be Metformin.
Keep browsing the forum and ask as many questions as you like. No question is too silly if you don't know the answer. Good luck!