Yes, but my understanding is that it would more or less be a one time hit. After it’s loaded you’d be storing X amount more water, but after that amount it’s not going to be changing that much week to week. So you might slow for a period then all things being equal go back to normal loss.
I would say yes but because you’ll be building muscle. The water storage associated with creatin leads to an increase in cell swelling, which acts as a stressor on the muscle that leads to muscle growth so you’re likely to see a 1kg weight gain in water storage initially. It depends if you’re going for weight loss or wanting to look trimmer. I personally weigh myself once a month but take body measurements, as although my weight doesn’t drop much, I am losing inches and I feel much stronger and leaner.