HelpCan I wear a black dress with some red/white with black/red flats to my boyfriends church on Easter Sunday?

His grandma wants to meet me and I want to make a good first impression. I'm going to their Christen church in Iowa. I'm 13 and he's 14 we've been dating for almost a month. I'm kinda emoish that's why I would rather die than wear yellow or pink this is the only dress I have help! Also, it would be nice if you could tell me how to do my make up cuz I'm gonna straightin my hair. The dress has half sleeves but I'm going to wear a long sleeve black plain shirt with black leggings. I.D.K. What I'm gonna do....