Hiya welcome to juddd! Yes those first few dd's can be really hard, but they do get easier once you get into the swing of it. Try to wait as long as poss before eating and remember to drink plenty of water throughout the day as this will help you feel fuller plus gets your body working properly. Try to drink at least 2 litres, I usually drink between 3-4 a day, but I have for years and don't drink much of anything else through the day.
I always split my dd's into 5 x 100 cals, then you can space it out and know you have something for later. I try not to eat until 1-2pm, later if I can.
Good luck x