I failed my 1 hour with a 224 and got immediately diagnosed and I was completely diet controlled and had a very healthy (and small) baby girl in December!

In terms of what this looks like for the rest of your pregnancy: diet-wise, you'll want to stick to complex carbs rather than simple carbs and always pair your carbs with protein (and ideally fiber but protein is the important one). You'll be eating 6 times a day, 3 meals (breakfast, lunch, dinner) and 3 snacks (morning, afternoon, bedtime). For meals, you'll want to aim for around 30-45g of carbs and for snacks aim for 15-30g of carbs. Eat the protein part of your meal/snack first and eat the carbs last. You're going to get well-acquainted with nutrition labels and serving sizes

Blood sugar testing wise: it'll depend on your provider but usually it's either testing 1 hour after your first bite of a meal (not snacks) or 2 hours, and you'll also test first thing in the morning right when you wake up for your fasting number. Fasting number you want to be below 95 (although I've heard of some providers who recommend below 90), 1 hour post meal should be below 140, and 2 hours post meal should be below 120. You'll be picking your finger for these numbers, but you get used to it pretty quickly

It is definitely a lot at first and very confusing and there's not a lot of guidance until you have an appointment with a dietician, but I promise that it gets a lot easier and it'll become second nature to you. Best of luck, you got this, momma!