I'll try my best to help you out, I had the same problem
For example let's say you are using white (Main color) and Black (contrasting color)
Cast on 66 stitches
knit 6 stitches in white, then 6 in black continue til end of row, carrying your yarn as you would normally
knit 6 stitches in white, before knitting another stitch, take the white yarn and bring it in front on your work (If you're a right handed knitter, the yarn would come from right to left), then pull the black yarn from in front of your work to behind your work (again being right handed knitter from right to left), knit 6 stitches. Then bring your black yarn in front of your work and take your white yarn and bring it behind your work, knit 6 stitches. Continue for the entire row.
On the uneven rows you always need to move your unused yarn before you knit any stitches.
Always cross your main color over your contrasting color.
Hope this helps