Let me explain this to you like you're five.
Transgender people are people who feel like they were born in the wrong body. For example, a person who was born with a male body may feel like they are really a girl on the inside. A person who was born with a female body might feel like they are really a boy on the inside.
Transsexual people are people who feel like they need to change their body to match the gender they feel they are on the inside. For example, a person who was born with a male body but feels like they are really a girl on the inside might want to change their body to look more like a girl's body. This could mean taking hormones or having surgery to change their body.
There are different types of transgender and transsexual people, and everyone's experience is different. Some people might feel like they are a different gender all the time, while others might feel like they are both genders, or like they switch back and forth.
It's important to remember that everyone's feelings and experiences are valid, and that it's okay to be different. We should always try to be kind and respectful to everyone, no matter how they identify.