Welcome from MA. Looks like you aren't doing too badly following patterns. Did you post a chicken quilt? I didn't see one, but I might have missed it. I found that the 1/4" pressure foot with the guide edge works best for me. Other than practice, practice, practice, I don't have anything to recommend, as I still occasionally have my blocks be slightly off. That's why I always square them up to one size before putting them together, makes it a lot easier that way.