Only slip the first stitch. Work the last stitch. When you turn the work, the formerly last stitch becomes the first stitch of the new row, which you slip, and then work the entire row across (even the last stitch), turn, slip, work, turn, slip, work, etc.
Actually, this method is supposed to give you nice neat ends that look like they're stockingette stitch. It also makes it easier to "pick them up" if you're going to knit sideways (don't get scared....you'll understand by your second or third sweater).
So it sounds like you are doing everything right except slipping the last stitch.
Oh, there's so much to learn!