Giving up carbs can be easy in the short term, the novelty of having fatty stuff instead is a joy. However, after a while, my experience is that I crave carbs.
I think the usual daily amount is up near 300gms
Low carb is probably below 150gms
Very low carb below 50gms.
I just try to avoid carbs full stop.
You need to become obsessed with packing and reading how many carbs are in a product. You need to see how many grams of carbs per 100 grams there are in the product.
Some things have carbs but also have other benefits, such as fruit and veg of course. Some don't such as rice, pasta, potatoes and bread. I don't eat any of these if I can help it.
But you can eat meat and cheese together with red wine, so it's not all bad news! As
@Goonergal recommends, read Dr Fung or watch some videos on YouTube. I found him very thought provoking.
I hope this is the start of your mums journey to a better BS level.
Out of interest, my hba1c went from 71 to 47 in three months on a very (ultra) low carb diet.