put together a small scrap (sandwich) and do some practicing before you start stitching on the 'real-thing' when you are comfortable with your stitches and the technique--it is time to move forward to the real quilt-
but really- if you don't like what you do you just have to take it out (which can be quite a time consuming pain-but is 'do-able)
so best advice- do some practicing first.
and it sounds as if the hoop you found is a quilt hoop- they look like embroidery hoops with wider/larger bands.