Welcome! That's amazing that you and your family have already been doing such complicated cosplays! I bet you could contribute a lot to this site if you ever want to do tutorials!
I hope you find all the help you need.
Current Cosplays in Construction:
Tharja (Fire Emblem: Awakening)
Palutena (Kid Icarus)
Holo (Spice and Wolf)
Daisy (from the Mario games)
Kuro Usagi (Problem Children are Coming from Another World, Aren't They)
See you later, space cowboy