I viewed a tutorial on trapunto, picked a design and sketched it out on a small sample piece. I then used water soluble thread to outline the design, then backed the trapunto with more batting and backing then quilted around the design.
I made a small design (a fleur de lis) just to learn the skill. I liked it so I mounted it in a 9" embroidery hoop and hung it on the wall.
Just jump in with something small!!!