Hi Keris, it can take a little while for you to learn what is best for you and get your levels down consistently. The main thing you need to be careful about is carbohydrates. It would be a good idea to spend a week writing down in a food diary everything (and I mean everything!) that you eat. Write down how many carbs were in the meals, snacks or drinks and also write alongside it your blood sugar levels before you ate and then one and two hours afterwards, and the insulin you took before eating.
This might sound like a lot of testing, but it is the best way to learn what types of food raise your levels the most and what is OK. Don't worry too much if you see some high numbers to begin with - this is about learning what works best for you. If you are hungry then protein in your meals - like eggs, fish, meat, nuts etc. will help fill you up, or you can eat lots of vegetables instead of potatoes, pasta, rice etc.