I know that it is hard, but I would encourage you to stop weighing yourself so often, and give everything more time. This is a long game.
In answer to your questions, we are all very, very different, and there is no single magic formula that will ensure we lose weight consistently, or even lose weight at all.
I expect that you will adjust and tweak your way of eating a lot over the months and years to come, but you can be reassured that weight rises and falls and plateaus and drops. Just don't assume that if the scales go the wrong way for a few days, it isn't working - because even if you aren't losing weight, you are still controlling your blood glucose which is the main goal, in my view.
As an example of how different we all are, I do not lose weight on as little as 20g carbs a day (because we all have different factors at play as well as carb numbers), and I have learned to not weigh myself more often than every month or so.