Sometimes we are bored with studying here. We must change our study style, try to study with other people, or study in public libraries.
And in some ways we should get out of the study and make pleasant trips with friends
Way to go! You are in high school and already can communicate in English. You don't need motivation, you got it already. I suggest make learning more fun and relatable to every day situation. It's not merely studying, it's learning new things.