Should I wake up at 5:15 if I am 14?

So I wake up at 5:15 on school days so I can do my work and have some time to recover myself from the grogginess from sleeping. However I usually sleep at 23:00 or even later as I am busy. I’m trying to sleep more, so any advice? Is this healthy? Or should I push my wake-up time to 6:30? Though this makes me feel like slop in the morning.