I want to applaud you for your courage in showing your attempt at quilting! If it were me I'd have been too cowardly. As a matter of fact, I'm too cowardly to even attempt my own machine quilting. If it's a large quilt, I take it to a quilter. If it's not too large, I hand quilt. So, you're doing much better than I am. And this is after at least ten years of quilt making.
Keep on practicing! That's the answer. Nothing as wonderful as lovely quilting comes without a lot of prep and practice. 8-) ;-)