As I understand things you are OK with both license and insurance renewal so long as you have not been advised that you are not fit to drive. (Note double negative-the default is that you are assumed fit).
You might find it helpful to phone DVLA and ask them to confirm this. This might stimulate...
A few points
Testing on the side of the thumb is less painful than fingers; especially finger tips
I never test anywhere else and don't find it too painful.
The 4 and 7 targets if I recall correctly are carried forward from old guidelines about pre meal testing; post food readings are often...