best way to start is look at a pattern for the specific style in your body size...for Body suits I find that Wetsuit patterns work best.
Then after that make the modifications you need and just work from there
Anime USA 2015...Halloween!
Yuri Kuma Arashi- Kureha Bear Form
Evangelion- Asuka Langley Soryu Yellow Sunddress
Magic Night Raye Earth- Ferio Yellow Shirt Version
Artist's Alley Hopeful....We'll See
Wondercon 2016...End of March
Marvel Comics- Scarlet Witch Original Design Version
Deadpool/X-men Comics- Siryn...not sure which version yet...
DC Comics- Raven Either Teen Titans or Original Comics version....