Hi Fred and welcome. I see you have had lots of good info already.
You seem to be getting to grips with it all, theres a lot to take in initially!
Not sure if you have one, or want one, but there are a few good cheap blood glucose monitors (some sold on the diabetes uk website) and IMHO they are handy to have and use. NB: they only come with a few test strips and lances, so you may need to buy extra, some are cheaper than others.
They require you to finger prick and then put a spot of blood on a test strip, which is then put into the BG monitor which then gives you a BG reading. So, they show you what your BG is doing at any one time.
Whereas, the three monthly blood test (HbA1c) gives a three monthly average of your BG levels) so is slightly different and arguably more accurate. Some Dr's advise against peeps doing their own home testing, but most on here think its a reasonable thing to do.
You don't need to get obsessive about BG testing, don't need to do it every day, etc. But it is a handy tool to use occasionally to see how your BG levels are doing.
Testing first thing in the morning when you get up shows your fasting BG level.
Testing just before eating, then two hours after a meal tells you whether that meal/food has spiked your BG and to what level. So within a short length of time, you can get an idea of what meals you can eat and what meals to avoid.
General guidance for T2's is an average BG level of between 4 and 7 (or 8).
When testing after meals you generally want to see it rise no more than 3, and ideally 2.
So if you test before a meal and BG is 6, when testing 2 hrs after the meal, you want it to be less than 9, and ideally less than 8.
But, peoples BG levels do go up and down throughout an average day, and lots of things (not just food) can affect your BG levels, eg: what you are doing, the environment, whether you are ill or not, stress, etc, etc.
Hope the info is of use to you.... keep us updated with progress..... cheers