It's fine to start the day with butter milk and fruit. You can eat a hot breakfast a little later once your stomach feels more settled.

No. I don't vomit after I eat anything but always feel not good after breakfast. I tried toast and butter but I don't know why eating toast make me constipated and I don't like butter after getting pregnant. I often drink buttermilk and eat pomegranate. But about breakfast still confused.

Is that you throw up your breakfast ? You may want to start your day with some toast and butter. Allow that to settle for an hour or so and then try breakfast. Avoid liquids and stick to solids like poha upma paratha. Milk tea and juices can pose unsettling especially if your hormones are still causing the morning sickness feeling