I love your quilt. If there are mistakes, only you know, because it looks great to me.
Haven't you heard the rule? The rule states that you stand 3 feet away from your quilt, and squint your eyes. If you can't see your mistakes from this distance, then they don't exist. LOL
I think many of us are hypercritical about our work, especially when we are new. Go easy on yourself and don't expect perfection. Each project I have done is a learning experience and skill builder.
Also, keep in mind that other quilters have had their share of mistakes so they would never criticize, and those that don't sew wouldn't even see a mistake.
You did a great job, great pattern/colors, so be happy.