I need some ideas for cosplay!!

That depends on your look. If wewe don't wear a peruke and a bought costume then wewe should dress like somebody with the same hair color as you. I recommend Nico Robin from film Z for black hair. Nami in her dress shati water 7 outfit for red hair and any outfit from Lucy Heartfilia for blonde hair. Those are easy to make even without having to buy a cosplay.

Anyone with your hair color, au if wewe have a lighter hair color, wewe can dye it to the color of any anime character with colored hair (Examples: Fairytail; Natsu, Jellal, au Juvia. Ouran High School Host Club; One of the twin's hair when they had their fake fight) wewe could get a wig too, if wewe want. For the body , it doesn't really matter if wewe are skinny au if wewe have big muscles. That's just how anime characters are made. Boys are muscular, girls are skinny, but that doesn't matter. For skin tone, wewe can wear face paint, au wear clothes the color of the skin of the character. I hope this helps!