Never picked up a paintbrush? Don't worry. You can still paint a wall like a pro!  You will need sandpaper, damp rag, painters tape, dropcloth, primer, paint roller, replacement roller pad, some paint, 2" or 3" brush and a roller pan. Prep the door and windows with blue painter's tape and put drop cloths down to protect the floor. Tackle the edges first using the 2" to 3" brush and brush on a band along the edge. Use a roller to paint in an up and down motion. Wait an hour or so for the first coat to dry. Apply second coat. Use a 2" brush to fill in any uneven spots you may have missed.  After the second coat is dry (about an hour), carefully remove the painter's tape and sit back and enjoy your newly painted room!