3D modeler tutor/helper

Im working a small 3d modeling project which is to make a character; however I am having a hard time making clothes for it. I have done the shape of the character but for some reason I am having a hard time modeling out the clothes (i.e the texture, wrinkles, looseness, etc). I know a bit of the basic modeling and yes I have use the cloth simulator, but it leads to disappointing results. Also the character is rigged too.
so if anyone is will to help me out on some advice or tips or help me on how to make loose clothes on my character, reply my post.
for those experienced modelers, this shouldn’t be too hard of a job to do since I did some of the work.