Try fairly simple stitches-long stitch or zig -zag,and make sure you are using low tension.Experiment on scrap first ,for card stock try a ball point needle

Technique ideas:

You can use the sewing machine to
"doodle" on a page
attach ribbon
several like items like flowers or fabric
form borders or frames
you can also hand stitch to add corner embellishments or attach items to a page.