You may want to give YouTube a look:
YouTube - Chroma-Key Test
which is fairly comprehensive and get you started off on the right foot.
One idea you may want to consider; if you purchase cloth, try to buy muslin, don’t waste your time on the plastic stuff you can by on the net. Another idea that used and am happy with is I used green paint, so if you have a room with a wall that you don’t mind have green, give that a try.
By the way when your on YouTube try searching for “Chroma-Key”
Take Care & Good Luck