Mice help

So yall there is a mouse in my room im a 13 year old boy im kinda freaked tf out and idk what to do i want to kill it but also i dont wanna clean up a mouse body so what do yall think i should do and idont think its just one theres one on my brothers side and i think ones under my bed what do i do and my brother leaves the most food around i left a little but now ill clean it up what should i do omg