how to sleep less guys

im m21, living a great life. but i sleep a lot. i sleep at 10pm and wake up at 8am if i have lectures, if I don't have lectures then i continue sleeping till 12pm, and then again after lunch i sleep in the afternoon for 3 hours, and after that i just play basketball or go to the gym or hang out with friends, then i have my dinner and sleep again. i have no problems in my life. no tension. no family issues. no money issues. no issue in anything, its like my life is great but im having issues with sleep like everyday i wake up with minimum 5 max 10 missed calls from everyone and i have a habit of putting phone on silent + turning dnd on while sleeping. and when i wake up, i don't even feel like calling them because i think its rude to call them after 3 4 hours just because i was sleeping. its not like im a lazy guy because when im awake im active af, i do physical activity for 2 3 hours everyday. its just that i sleep a lot and i love sleeping. but its kinda making me think that im not being in contact with the rest of the world yk, everyday i get 10 missed calls i don't even call back because whats the point in calling them back after 3 4 hours. i wanna sleep less. i sleep 15 out of 24 hours everyday (on an average) many people can't even sleep while i fall asleep the moment i close my eyes its as if i have no thoughts in my mind. and while thats a good thing, i have no other thing to do (well ofcourse i can use that time to study) but i dont like to study as im smart enough to cover the whole syllabus 2 days before exams (i don't sleep during exams at all)

so should i sleep less or am i good with it? i have a great academic & athletic record in college, i am physically fit as i play sports & go to the gym regularly, i don't have any issues with anyone, i seriously don't know what else to do that's why i sleep. its like ive maxed out my stats. what else can i do? or better, help me with making a good study time table. as that's the only thing I don't do. but again i score good so I don't feel like doing that, and im not interested in watching netflix or playing games anymore, shi ion even fw reels anymore.