Hi JellyBeanMamma and welcome!
Others might disagree, but the presence of ICA512 antibodies does make it highly likely you are in the early stages of LADA which, as you know, is an autoimmune form of diabetes. It is progressive and at present, there is no way of halting that progression. It is not the same as Type 2 pre-diabetes as that can often be reversed by losing weight, changing diet and tackling insulin resistance as the body is still producing insulin but not using it effectively. In my view, you are not really pre-diabetic as such - you are in early stages of LADA which means you are diabetic - your body is producing progressively less insulin and that will one day reach a tipping point whereby it produces insufficient for your needs. Eventually insulin is inevitable. That's the bad news.
The better news is that there are measures you can take which might slow the progression and will help your body work within its available insulin production. Basically, you need to cut down as far as possible on the Carbs so that you don't need more than the insulin you have available. This will also keep your BG low which is really important because high BG - even slightly high for short periods - is toxic to beta cells, causing your ability to produce insulin to decline further. I need to be clear though, this will not reverse your condition if you have LADA because your beta cells will still be under attack by your immune system, but it will help preserve what you have.
I was diagnosed in the early stages of LADA, when my fasting BG and HbA1c were still in the non-diabetic range, but my first-phase insulin production was already badly-impaired so I was getting serious after food spikes way into the diabetic range. Unfortunately, I was misdiagnosed Type 2 and left without appropriate treatment for way too long and my condition deteriorated rapidly over the following 10 months or so. At that point I needed insulin.
I would say if you want to preserve the insulin production you have for as long as possible, it is essential that you keep your BG within the non-diabetic range - and if the only way you can do that is with insulin, then start small doses of insulin early - it gives your body a break, keeps your BG in normal levels an gives you a chance of preserving you own insulin production for longer.
It might be worth asking for a c-peptide test - this shows how much insulin you are producing and will give you an indication of how sufficient your insulin production currently is to your needs - it let's you know what you are working with - basically how far progressed you are.
I would suggest getting a copy of Dr Bernstein's 'Diabetes Solution'. Dr Bernstein is an American physician who is In his 80s and has had diabetes all his life. He advocates managing diabetes by normalising BG by eating a very low-carb diet and thereby minimising insulin requirements. He is a remarkable man and even if you don't want to follow his methods, the book is still very informative about the condition.
Stick around on the forum - there are several highly knowledgeable LADAs on here and I'm sure you will get good advice and information.
Smidge