You need no ritual items, except for paper, and a candle I suppose. The bowl, I did not have. I live in a xian household, and every item I could have used has been cursed by the enemies energy. I had no sigils. I basically only had a candle and paper, along with a tack for drawing blood. I luckily had black clothing, but that is also optional.
You can even say HAIL SATAN in you head if it will maintain secrecy. You can recite the invocation in your head as well, even write it down on a piece of paper(which you would obviously want to dispose of later on after the ritual) if you cannot remember it, I did. Any candle color will work. It's what's in the heart that counts. Hell, if it comes down to it, and you have people you cannot dodge in any way, you can perform the dedication ritual in your astral temple. But, when you are ready, DO NOT procrastinate. It's what the enemy wants.