Hey, I just bought my first bike 03 YZF600r and I have a question on shifting.

I rode my bike this weekend and notice that shifting into 1st while the bike is at still produce a clung and the same think when shifting from 1st to 2nd, the rest of the gears shift smooth. Since they are not teaching the proper way to shift in the MSF course I would like to get your advice on proper shifting.