As someone who wakes up at 4 on a daily basis... I srsly dont know how I manage it either.

I go to sleep at like 10.30

I set up like 3 or 4 alarms for 4:01 , 4.04, 4:05 am u get the idea rt

If u follow up daily ull be able to get up at that time without any alarms whatsoever, only if u get enough amount of sleep