Oh don't be scared
we all have been there and done that and still do it. its a 1/4th seam. do you have a 1/4th foot for your machine? if not get one... it will be a life saver for you and your seams. plus the grains.. you should learn the grains of the fabric, width doesn't stretch, length does, bias does. aboutquilt.com has a lot on grains and seams.
anyway welcome from Oregon