How to prepare a bedroom for painting.?

[purdybabygrl1990]

ok,
I need to paint the inside of my closet and my walls and ceilings. The only problem is that I don't know how to prepare for it. I have furniture along the walls as well as portraits and photos. I also have built-in shelves in my closet. Do I need to tape up the corners and edges of the walls with painter's tape? (F.Y.I., I have two colors, closet/ceiling--> white, walls---> teal) What tools would I need? Supplies, such as a tarp and spackle and so-on so-forth? I have a door on one side, three closets taking up an entire wall, a sliding glass door on the next side, and a window on the fourth wall. I am 17 and my mom is always at work and we have been trying to paint the bedroom for about two years now so I just need to prep and then paint. Thank you!