There are so many things to learn but we just have 24 hours a day and we need to sleep and entertain ourselves beside learning. I suddenly came up with an idea to make use of time. That is, my entertainment will be to study too. The good thing is that, I find it relaxing and fun when I study. The problem is that I am not so disciplined and there are so many distracting things around which also attract me.

There is so much to learn, but precious little time in a day. Besides, we need sleep and fun too. I suddenly came up with a way that allows me to rethink time in a whole new way. Why not reimagine my studies as a form of entertainment? Why not dwell on the fun and relaxing side of studying? Seeing it that way, I might be able to ignore the temptations that surround me. I prefer "so much" to "so many things to learn". They are equally correct, but the uncountable form "so much" creates, in my opinion, a better image for an overwhelming situation. Also, it eliminates the word "things" that serves no real purpose. I also like the contrast of "so much" versus "precious little". You could also use the simpler "so little". You do not need "to entertain"! That would mean inviting guests over for dinner, for example. It is optional, not necessary. "Entertainment", not "to entertain", is the thing that is necessary. I was confused by your last sentence. It sounded to me as if you changed your mind about everthing you had just said. I like the way you do your little essays. You do not make too much use of AI, as many students do. This allows you to make natural mistakes and allows people to offer suggestions that help you to learn.

There are so many things to learn but we just have 24 hours a day / in a day and we need to sleep and entertain ourselves beside learning. I suddenly came up with the idea to make better use of my time. That is, I'll entertain myself while studying. The good thing is that I find it relaxing and fun when I study. And the problem is that, I am not very disciplined and there are so many distractions around me that also look attractive/appealing to me.