If you stabilize your project by stitching in the ditch in both directions between the blocks, you can start in the corner or wherever you want. Once you have stabilized, check the back and look for those folds and correct before starting within a block. If you do not like the blocks stitched, use the thread that washes away once the permanent quilting is completed.
I always do a dry run on a scrap sandwich to make sure my machine stitches do not need adjusting. Suz