I can sympathize with you, I’m in school too, and what works for me is doing a really short WBTB and then MILD.
Just wake up two or so hours before you actually need to wake up, and really be aware of the fact that you’re awake. That’s the important part. Then go back to sleep. It takes 5 minutes tops. Of course there are thousands of variations. Just a suggestion
I do occasionally get LDs in first REM cycle. The disadvantage is these tend to be shorter then dreams towards end of night.
Autosuggestion and MILD can help.
I find this most likely to happen for me if I meditate and directly into a deep sleep mode. I will wake up after an hour spontaneously. I don’t get out of bed just go back into regular sleep and then often I become lucid.
Since it’s difficult to fall asleep quickly when you first go to bed, and given the fact that your first REM cycle will not be that long, autosuggestion is probably the best thing you could do. The, supplement it later in the night by trying WILD or MILD