Biphasic Sleep - Day 1 + Schedule

Ok, so here it goes.
After researching all day long, I decided to become a biphasic sleeper. Some people such as Joseph Young will say that I'm about to radically change my life, and maybe I was a little bit to impulsive when I see people who wait for months before actually starting. But I really think I've got nothing to lose, and if it turns bad in a way or another I'll just go back to monophasic sleep.
Like most of other biphasic sleepers, I'm going to organize my sleep schedule in one nap, and one core sleep. I'll try and have a 90 minutes nap (one full sleep cycle) at around 6:20 PM, usually when I get back from school, and start with a 6 hours core sleep, from 0:30 to 6:30 AM. That makes a total oh 7.5 hours of sleep per day, which is about the amount of sleep I used to do during my monophasic teenagehood, but it seems a lot compared to what other biphasic sleepers do. The reason why I'm starting like this is that I discovered that most people have a hard time adapting during the first 10 days, so when my body adapts, I'll start and decrease gradually my amount of sleep to 6, and maybe 4.5 hours per day, but always with my nap. When you think of it, it's going to give me a lot of free time: I come home, have my nap, eat, and do whatever I want from 8:30 PM to 1:30 or 3:00 AM, depending on my amount of core sleep. Of course, the ''better for my studies'' is a good argument, even though I doubt very much I'm going to spend all that time studying, unlike Romain, the friend who first made me discover biphasic sleeping.
So this is my first day as a biphasic sleeper. Actually, it's only half a day, because last night was the last time I slept monophasic way. Anyway, when I first went to bed at 6:20PM, I just couldn't fall asleep. I tried everything I could think of: comfy warm bed, earplugs, dark room, but I was too excited with this biphasic stuff and the 9 hours of sleep I had last night, added to the Sprite surely didn't help. But from what I read, there's a 2 week adaptation where you are mostly to have a rough time, so I guess it's normal to not be able to fall asleep the first days. Anyway, I'm going to try and fall asleep at aroune 0:30 AM and wake up at 6:30 AM (I think I never woke up that early on a Sunday in my entire life) and I'll tell you how I did.
Cheers.
Cactus