Well-written & good work! Just a couple suggestions/corrections to consider! :)

Less is more

"Less is more" has being become my life philosophy in recent years. Perfect!

I used to want it more. What did you want more of? Maybe: I used to want to do more all at once?

For instance, I would spend time on <s style="color: rgb(230, 0, 0);">all the</s> things I enjoy, like studying several languages at the same time. ”All of” implies multiple things. You could use “all of the things you enjoy,” but you would probably list a few of them like: studying several languages, playing the guitar, and learning to juggle.

But in the end, I did poorly because I was doing too much.

Eventually, I found that the energy of human beings is limited.

We need to put our energy into the most important things so that we can do them better.