My Past, Present, and Future

Hello guys, nice to see you again. Because of an assignment, I have to write a letter to my younger self and to my 10-years later self. I am not good at writing letter, so I am confuse what to write, but if you can see this post right now, then the letter is already done and you can see it below this paragraph :D

Start with the letter to my younger-self. I will choose when I am still in elementary school.
"To my younger-self who hasn't known much yet, if you are happy the way you are right know then know something that happiness only last for a moment. Stop thinking about yourself and look around you, try to interact with others as much as possible because when you are not used to it, you will have a trouble later. And even your grade is very good, know that someone is always better than you. Don't be arrogant and slack off when you still have many time. Don't give up and keep going even when you are very tired of the situation. You still have your family who loves you and supports you, so try to make them proud. That is all what I have to tell you, see you."

And a letter to my 10-years self. That means in 2026.
"To my future self, how are you right now? Are you in a good shape or in a bad shape? If you're in a good shape and you are in process to achieve what you want, keep going and don't forget to learn and learn again, because the wheels are always spinning. But if you're in a bad shape, I'm very sorry, because it may be my fault. I will try to fix all my mistakes so you can be at ease. Don't give up just because you failed once, and try to express your feelings more. There are no humans who can be alone, so ask them for help if you're in trouble, don't face it alone. Thank you for this ten years for your blood, sweat, and tears. I hope you stay cheerful and keep your spirit up"