help me pls,oai,very sad,hix

I'm a newbie so i need to learn more,my first difficulty is modeling any type of sofa,so i want to making wrinkles on the mattress i haven't done that,i use subdivide and smooth plugin but failed.i need your help.Beside, i need a tutorial to make cloth sofa modeled by subdivide and smooth so i better understand.Thank everyone so much.

hello everyone,i'm a newbie,i'm from vietnam so my english isn't good.I need a tutorial videos or 1 word file to making leather sofa,if in this forum have this tut,you can get link on my topic.i need help form you,i would like to thank.