I need help on installing bathroom wall tile.
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https://www.youtube.com/watch?v=3roXFkFxg7s
First you need sheetrock that's waterproof, the job of putting up tile should be done by a professional. Homedepot gives classes all the time on dyi projects, and it free. Call and ask unless you in a hurry. Either learn to do it yourself, or call a professional. Good Luck!
Before you start to tile draw a Plumb line on the wall and a Horizontal line using a Spirit Level.