yup---PRACTICE PRACTICE PRACTICE....i always recommend starting with little practice projects and work your self up to big...as in...when the pot holders are looking pretty good move up to a table runner, when that size is managable and looking like you want go to a baby quilt...practice practice...each time your practice gets bigger you learn to manuver the project around and it will get easier...
no one can just do a couple little squares then jump onto a big quilt and have it come out the way they (thought) it should. it takes a long time to get there.
if you are in a hurry maybe you should try some easier lines to hold it together...if you do not have a nearing deadline, put it aside and go back to practicing moving all that bulk around.