Yeah the best thing would probably ask the person who created the spell and posted it. But i know sometimes the instructions for the spell can sometimes be unclear and confusing. I know cause I have read some of the spells on here and the instructions are not always perfect.
But if you also new and dont know how to cast this spell i would take more time with your basics and basic spell casting But if you are not new then it would probably be best to ask the person who posted the spell. Also another reminder just make sure the spell is legit and its not fake. Thre are some spells on here that are fake or fluffy.