I am sorry for your loss. Would stress of mourning the loss of your dead be a contributing factor for your high bloods?
Do realise that once you start using insulin, that's it. You have to count to being stuck with that regime.
It is a major difference, being on tablets or using insulin.
A tablet you take and then forget about it, until the next tablet.
There are two types of insulin: long acting and short acting.
The long acting you use once a day. Some divide it over the day, but standard is once a day, usually before bedtime.
Short acting insulin you take directly before or after a meal. Your diabetic nurse will discuss with you when it is best for you.
You might not start on short acting for now.
It will control your life. You have to check your bloods at least 4 times a day, sometimes more often.
You do not go anywhere without your insulin kit: pen, meter, needles and insulin.
You have to be very aware for hypo's, as this is the most common side effects of insulin.
You will have to make sure you are not getting obsessed with the diabetes when having to check your bloods all the time and inject yourself.
Injecting yourself with insulin should not be too painful and quite often painless. You can't compare it to a flue jab or something like that, as the needle for insulin is much thinner and shorter. You inject just below the skin. Some days you wouldn't be aware you are actually sticking a needle in you, if you weren't watching what you were doing. Other days you have to try a few times, because it seems to hurt everywhere.
You have to learn to make it part of your life. And make sure you have a support network.
It's a lot to take in. Keep asking questions. We're here.