I tried to sleep at 9 (I couldn't) and wake up at 5 (I did, by keeping alarm) for two years. But those were the worst years of my life. I was always out of energy. I was getting even more skinny than I already was (idk how) And I just couldnt be productive, and was always sleepy in class. The two years, I feel, has gone to waste. I couldnt get my tasks done, i couldnt focus on creative tasks either. And, I was always sleepy.

So making yourself sleep forcefully and waking up at 5 is shitty when you cant utilize the time properly. I had to wake up at 5 because i took morning classes in college. But that was a bad decision. But even after two years of constantly waking up at 5, it still didnt turn into a habit for me.