My first attemps at animation

Well not exactly the first, but one of them. I would love some links to tutorial downloads, and also some advice. I am having a problem with turning around while walking. Also, I am getting this strange flicker. It is paricularly noticeable on my character’s helmet… someone please tell me what to do about it. OK well, I can’t get the files to upload. I will try later, if anyone has any thoughts you can go ahead and post it. also, if anyone knows why an mpeg won’t post let me know that too.