Hi and welcome from me too.
It took 6 weeks for my GAD antibody result to come back and that was pre Covid. The C-peptide test was back in a couple of weeks if not less. Some tests are more specialized and therefore take longer, the important thing is that you have been started on insulin..... Which one have they given you and how are you managing both practically and emotionally.... It is all a bit overwhelming at first but it really does get easier. I am another late starter as I got my diagnosis nearly 4 years ago at the age of 55 and there are quite a lot of others here on the forum who developed it later in life. I just thank my lucky stars it didn't hit me as a teenager and I haven't had to spend the majority of my life managing it and my heart goes out to parents whose young children are diagnosed.
Anyway, delighted that you have found the forum because it is a goldmine of knowledge and practical advice and support from people who have been there and got the T-shirt. I found it incredibly useful to fill in the blanks in my mind where the info the nurses gave me went in one ear and out the other. In fact members of the forum here recognized that I was Type 1 before my health care professionals did and before I had the blood tests. Like many others here, I was initially assumed to be Type 2 and started on oral meds before I was eventually started on insulin and then the consultant authorized the blood tests.
Do shout up with any other questions you have. I didn't even know that Diabetes UK had an app for logging readings etc. Most people here used to use MySugr app I believe although I started with a different one, but I imagine most of us now log everything on our sensor app (ie Libre or Dexcom or other CGM) or perhaps pump apps for those with an insulin pump. I am guessing they haven't given you a Libre sensor yet if they are waiting for confirmation of Type. You could apply to Abbott Laboratories for a free 14 day trial of their sensor. The only thing you need is a diabetes diagnosis and an appropriate phone and there should be a list of compatible phones on their website. If you are Type 1, you should get it on prescription, but no harm in taking advantage of the free trial in the meantime.
Anyway, just wanted to say hello and please make yourself at home here..... If you fancy getting to know us a bit better, come and join us regulars on the "Group 7-day waking average" thread, where we post our waking reading each day and exchange a bit of chat or banter or have a good moan about the fickleness of diabetes and our erratic levels.... or just occasionally celebrate when we get really good results. It is a bit like a virtual all day coffee morning. Sometimes just touching base and comparing notes with others who are also facing the same challenges can make it all a little easier. I will copy a link to it below, if you fancy joining us, but no pressure if that isn't your thing.