I can’t give a whole lot of advice re the food part other than wondering if you’re eating enough calories overall. When I started I tracked calories for a few days to see how much I was eating when eating to satiety and I was WAY below the target amounts for my lifestyle and I couldn’t even reach them by eating till I was stuffed.
I would suggest you try swapping out the water for something with calories. Whether it be whole milk (my favorite) or juice or soda. It’s really no fun feeling thirsty so I’ve found it VERY helpful to drink the above as then I can drink whenever I feel like it without flooding my system and it’s made a huge difference.
Best of luck figuring out what works for you!