Are you using a quilting foot? I checked on the web - there is a one quarter inch quilting foot available for your machine. Some quilting feet even have a vertical guide attached at the exact one quarter spot.
If you are not using a quilting foot, does your machine have a clear wide foot that has lines on it?If so you could place your tape in front and behind the foot so you can line up your piece and see what you are doing.
I found when I was starting that speed was my enemy. I am sure others will have more recommendations but my best suggestion is
Take a deep breath, take it slow and enjoy. Good Luck.