Bev, it's actually really easy.
Find the stitch you want to use...zigzag, blanket or whatever.
Play with the size of it on some scraps.
Then, once you are a bit more "experienced" with it, just go for it!
I use LITE Heat N Bond to fuse it down. Others don't use anything, but I don't like wiggly pieces.
The secret is.....patience, patience, patience.......