If you are skilled at English and want to learn to cook Korean foods, I can't recommend this site enough: www.maangchi.com
It's the website of a Korean woman who is living in new york and posts video recipes of Korean food. She is very good at it and very helpful and responsive to questions about Korean cooking. She also regularly updates her site with more recipes.
She has two 김밥 recipe's right now. I think it would be easily adjust one to make what you would like.
Normal Kimbap http://www.maangchi.com/recipe/kimbap
Triangle Kimbap http://www.maangchi.com/recipe/samgakkimbap