I think your quilt block is beautiful. My first bed-size quilt was a whole-cloth, embroidered quilt, so no fear there, right? Then the first pieced-block quilt I made was a Queen Size Plus which I made for a local U.S. Army Veteran who sustained serious injuries in Afghanistan. Surprisingly, I was not really terribly self-critical about that one but I knew the mistakes were there. Your quilt is really very good for a "first". Hopefully, I've improved my piecing, etc., but I know I'll never reach "perfection" -- that state just doesn't exist. I'm still a rank amateur, and I may always be!