Naah, you can knit and you can purl so you are sufficiently skilled! I do suggest you write down the changes you make to the patterns so that you don't have to reinvent the wheel on your second outfit!
Oh, before I forget, a very short length of [COLOR="Red"]loop stitch[/COLOR] would make great epaulettes!
And a thin icord could be used for leg striping on the trousers.
Are you doing both union and confederate uniforms?