I sleep 12h/daily and i eat a lot. is there something i can do to sleep less and eat less?

You need evaluation: to determine the reason for your sleepiness. It is possible that you have a hormone imbalance such as hypothyroid. Although there are many other reasons such as sleep apnea or poor sleep hygiene. Often times, a sedentary lifestyle CREATES low energy. You may need to force yourself into more activity and healthy eating. A health coach can help. If you are obese or gaining weight, you must act now.

Kleine Levin Syndrom: Consider the above diagnosis, especially if your excessive sleepiness and eating are accompanied by changes in your behavior or interest in things, decreased cognitive abilities, confusion, feeling strange. There are a number of treatment options but one, Modafinil, may help a lot.