Is everyone still with me?
I thought I'd give you a few days to complete step 3.
After you have 44 total stitches your mitten should look like this
And you just finished a knit row.
Next Purl Row - Purl 29 sts and turn. Don't purl past the marker.
This is what it looks like after you turn
Now you are ready to knit the thumb.
Thumb: Edited July 4th - changed # of rows to 12
Knit 13 sts, marking this row as row 1 and knit 12 total rows on these 13 sts.
This is the beginning of the thumb part with a marker.