I'm only learning, but I warm-up then do it the best I can. I never rip out work unless I am confident I can do it better. It is what it is and you will wreck the integrity of your fabric by pulling and resewing and endless needle holes. Enough already! Be proud of what you can do because it is the best you can do. God give me the grace to accept the things...etc. Of course, if you want to quilt your first time like the mothers of machine quilting - Gaudinski or whomever, knock yourself out.