I am sooooo confused, please help!!

What does K1(3:1:3), *m1 by knitting into the front and back of next stitch mean???

Which part of the instructions are you confused about? Do you have a link to the pattern that you are using? It’s usually easier for others to help you with exactly what you need if you can give a few details!

The numbers in the () are for different sizes, k1 for the smallest and third size, k3 for the second and largest size. Then you m1 by knitting into the front and back legs of the next st, the * in front means you’ll repeat everything after that. There’s a video for the knit front and back on the Increases page under kfb.