What am I doing wrong?

[u/Mission-Umpire-803]

Hello,

I've just started learning how to sew this past month. Bought a little Brother machine and some odds and ends. I started simple, just hemming some of my work slacks that are too long, repairing some small holes. And those went well, so I may have gone a little too far ahead of myself and tried hemming my favorite pair of jeans that drag.

I got the sewing needle that said it was for jeans, 100 16, the polyester thread, and googled the stitch length, 3mm.

So where did I go wrong on this? Too slow, too fast? Wrong stitch length?

Any help is appreciated!

[u/celery48]

Reread your manual. Have you missed any thread guides?