Like Michel, when my son was diagnosed we went out and tried all of the artificial sweeteners on the market. Since we aren’t trying to stay as low carb as you, we ruled out using these because they didn’t taste as good as sugar. With your goal of <50g of carbs a day, you will likely want to venture into this world.
My advice would be to buy small amounts and try them. We found that some tasted really weird to us, and it depended on application, i.e. some were good baked, and other worked well in drinks, and it wasn’t universal. i.e. my wife thought some tasted fine, and I thought it was horrible.
Being a chemist, I don’t think the natural vs. artificial is any big deal. Splenda for instance starts with sucrose and adds three chlorine molecules which makes it really sweet and I am sure tricks the body into not processing it like sugar. Most things we consume started out as plant based molecules, and some we can make easier than harvesting the natural substance, so artificial vs. natural is not that important to me.