This center design is exactly the next quilt our church group is planning to do for our fundraiser. Your colors are so rich. Can't believe this is only your 5th quilt top.
I agree with the basting spray use. It will help tremendously. Also agree, you might want to practice on something else before you tackle this project. I decided several months ago, that I would tackle smaller projects with my long arm to work on skills. Those quilts will go to local lap quilt charities while I am "learning". That way, I am also not wasting fabrics or my time. Seems like a win/win situation.
Just relax and enjoy the process. We all have a little "wrinkle" or two from time to time. When the project is completed, bet you won't even be able to find your "boo-boos" .
Keep posting your beautiful work.