Pass on the oujia board and buy yourself a pendulum. It is extremely easy to protect and control. Always cleanse a pendulum before and after use. I've been using them since I was 6 so if you have any questions feel free to pm me.
I stand by a firm hell no on any oujia board or talk board of any kind. They are magnets for spirits, good or bad. Truth is hard to force on a oujia board but a cinche on a pendulum. So you won't be fed lies.