I think it looks very good!! Can't wait to see the finished product!! I have not attempted triangles either. I would worry about the corners. Probably I just don't have a good picture in my head of how to do them. I have done half square triangles, but I don't like doing them....not with any of the three methods I used.
I think you are so wise to be starting with a wall hanging instead of something really huge. Everyone told me to do that, but I ignored them. Just quilting that sucker almost did me in.
I've only been quilting 2 years....still consider myself a beginner.