You've had a really helpful response from the excellent
@rebrascora above, so I'll try to add to this a little bit
Firstly many of us on here who are T1 have come to it later in life. I was in my early 40s when I was diagnosed. It's a huge upset and a lot to get used to, it sucks actually and that needs saying! but it gets better as you get to grips with it. Diabetes or any long term condition is a marathon and you can wear yourself out trying to control it, but ultimately we do the best we can on any one day, take the wins, and accept some days will be a bit rubbish. Finding a way to manage things
that works for you is, in my humble, the way forward with this.
1) if you do not already have a CGM, I suggest you get a free 14 day trial one from Libre in the meantime, but it should be available to you as a T1. As you'll see from other threads the key to libre/cgm in general is using it well as tool to see what your blood sugar is doing in between finger pricks/meals etc. This can give us a lot of information which helps make plans
2) You do not have to low carb. Some members enjoy this way of eating and find this useful, but it is not necessary if it does not work for you. Personally I find coconut flour to be the devils work, and would much rather have a piece of deliciously carb-laden cake from the bakery and bolus for it. Once things have settled a bit more and you are confident with your insulin, you can pretty much eat as you would have before T1. The carbs and cals book/app is useful in the beginning for carb counting (actually i no longer need my copy of the book, if you would like it, dm me your address and I will send it to you), but eventually you will get your eye in and be able to accurately guesstimate the carbs in anything on sight.
3) Hopefully fiasp helps you - I can see you've had good advice on the other thread. We can't advise on dosing, but keeping good records of timings and amounts of insulin, reviewing and looking for patterns/having a chat with your DSN should help. Insulin resistance is often highest in the morning due to something called 'dawn phenomenon' or 'foot on the floor' when the liver helpfully dumps glucose into the bloodstream and this can make breakfast more challenging to bolus for. From everything you've said you are doing really well, just be gentle with yourself as you are learning.