Kas,
I am sure there are smart quilters on this board who can give you advice on fixing those triangles/how to avoid triangle problems in the future. But I am not one of them. Personally, I think the Off-Angle-Triangles give the quilt movement, like those little boats need some rough water to sail on. Years from now when you are a famous quilter, people will see this little boat quilt and ask "How did you DO that?" You'll just smile and say, "It was quite difficult. Certainly not for a beginner."
So, just call yourself the Picasso Of The Quilt World and finish off this baby.