It's okay if it looks all bumpy! Don't panic!
(I've attached a picture of my very first knitting attempt...not too long ago...the only pic of garter stitch -- knitting all rows -- I had on hand.)
It's true that knit stitches are little Vs and purl stitches look like the scarf guy, but on the reverse side, they are the opposite. i.e. the back of a knit stitch looks like the front of a purl stitch. Does that make any sense?
(So if you knit all rows, half the rows will look like the front of a knit stitch, and the other half will be backwards. If you want the whole right side to look like Vs, you have to knit one row, then purl one row, because when you turn your work, you're knitting on the wrong side.)