I am male and 22. I want to sleep 6 hrs a day. But when I wake up in morning, my whole body feels very much?

I am male and 22. I want to sleep 6 hrs a day. But when I wake up in morning, my whole body feels very much tired and I can't wake up from bed. I also feel my brain starving and it is very much tired. My eyes also very much starving for something and feel hard to see immediately after waking up. I use spectacles. Please help me. I wake up after hearing alarm , but I again go to sleep and it ruins my work schedule. I again go to sleep as my whole body feels tired and I sleep for 10-12 hrs a day which I never like. I have lots to study. Please help me. I beg u.