Hey im about to dedicate, But U have just one more Question??? I have a blue and red candle, because the website says you need it, but I went and bought this other candle, but its half black and half green!! Is it still ok to use it and do you do the Ritual at night time???

Hi im new to this, do u have to do a Self Dedication Ritual before you can summon a demon? And what happens when you do the rituel does it work straight away? Also Can you summon 2 different Demons at once?