Not sure if this is the place to ask but here goes anyways;

I'm 18 and started serious fitness a couple of weeks ago. I heard that sleeping is the most important part of growing muscles.

Two weeks ago I developed this schedule of going to bed at 2 am and waking up at 7:55am, basically because I get 5 minutes to get ready for school that way.

I didn't like this schedule because I'd be too tired for the gym by like 6pm or just the feeling of "ugh it's already 6pm I don't wanna go to the gym now"

Today for the first time I got my schedule looking like this.

Go to bed at 8pm and wake up at 4am, get breakfast, gym, shower, study before class. Now it's 4pm and I'm really tired, I feel like if I kept this schedule just for school and fitness it'd be perfect.

But obviously as an 18 year old, people ask me to go out with them on a weekly basis but if I were to have to go to a party tonight, there's no way I'd have fun or be able to wake up the next morning at 4am.

How exactly do I keep a consistent and do-able sleeping schedule?

What does your schedule look like off and on party nights?

Do I decline party requests in order to keep this nice schedule?