Hi hun, sorry to hear of your diagnosis, but it can be easily managed

It's all down to your hormones, so please don't think any of this is your fault. I've been managing my GD with a high protein, high fat diet, obviously low in carbs. I try to have some carbs with every meal/snack as baby still needs them to grow, however I try to pair them with enough protein, fat & veg/salad to slow the processing.
Testing can vary a lot depending on where you are from, I have to test in the morning before I have my breakfast (my fasting reading), and then 1hr after each meal. My diabetic team have given me numbers that they'd like me to stay below.
As time goes on, you might find that you can tolerate carbs less - this doesn't mean you need to cut them down, but that you need medication to help manage it. Again,this isn't anything you're doing wrong, it's just that our hormones will continue to increase up to around 36 weeks & unfortunately GD can get worse up to that point.
I found a UK based FB group, but I know there are some US groups on there too. It might be helpful to join one of them if you can? I've found the UK to be a godsend when getting my head around GD! Although B&B is fantastic, I've not found many women on here with GD, so the support I get on the FB group has been wonderful.
Your baby should be absolutely fine as long as your GD is managed well (either by diet, or meds). Your team should keep a closer eye on you & baby from now on anyway, so any problems will be caught early xxx