Welcome to the forum Andy.
Feeling low is natural you've made a good move today so congratulate yourself!
The good news. Starting with similar readings and HbA1 results as you around 7 weeks ago with the help of all the people on this forum I now get meter readings between 4.5 & 6.5 at the vast majority of times when I measure which is just before I eat and 2 hours after. I take the same amount of Metformin as you. At those meter levels I am nearly running at the level that 19 out of 20 non diabetics would achieve so I am very pleased with the result. I have lost loads of weight and a massive 4" of my waist.
The bad news. Its hard work but trust me it gets easier day by day and I feel so much happier and better 7 weeks down the line. I won't give you specific dietary advice but just point you at a reduction in carbohydrates as the key. Reducing to 60g / day did it for me and I am currently keeping roughly to that level. You may find you can eat more or less carbs than me as everyone is different. At the start don't worry too much where the carbs come from. If you find yourself eating loads of bacon, eggs and cheese that's fine imo as you can get to a better diet once you've got your levels under control.
You can work out how much carbs you are eating by looking at the small print on the side of packets. Include the total carbohydrate number not just the sugars as sugars are just one type of carbohydrate. Some web sites such as
http://www.carbohydrate-counter.org/advsearch.php or
http://fatsecret.com/ are useful if you can't find the carb count for something.
As a Type 2 who is only taking Metformin you do not need to worry about "too low" blood sugars and hypos . Metformin does not stimulate additional insulin production and amongst other things works passively by reducing the amount of glucose your liver releases into you blood stream. True hypo's are normally caused by levels dropping rapidly to less than 3 by insulin injection and as such is a very dangerous condition for a type 1 diabetic.
It is theoretically possible for a type 2 person to hypo if they are on drugs that stimulate insulin production and
just as with any non diabetic person if your levels are low and then you do a load of exercise you can come over faint and feel shaky etc but this is not a hypo. At that point your body will be self correcting and your liver will dump glucose into your blood stream and you will recover
just like any non diabetic person
Getting the shakes can be caused by having too high sugar levels in fact I use to get them until I changed diet and reduced my sugar levels down to a normal range. It is very easy in the first few days after resolving to make a life changing choice so use "Oh I must go eat that biscuit, sweet, sausage roll, cornish pasty, chinese takeaway, curry sauce and chips or whatever because my levels must be too low". It's no different to going "one ciggie wont hurt I'll give up again afterwards"
Good luck!