Hello, can you tell us if our baby is about a year old? The baby write…

Hello, can you tell us if our baby is about a year old? The baby writes in a way that's not clear, sometimes the diaper gets wet after three hours during the day, and sometimes it's half full. To be completely empty is not like this, but sometimes it's half full for 3-4 hours. He eats soup every day, drinks water but sometimes he drinks too much, and sometimes he drinks too little. Maybe it's normal, but I started worrying. It's also hot at home, sweating often, and sometimes even hair is wet. Can you tell me if anyone has experienced something similar?