Lookin good so far...Ya might wanna put a fan on it. The stalk looks a bit thin. Putting a fan on it will cause it to grow a thicker stalk so it can stand tall and strong. However, dont put the fan directly on the plant. Aim it kind of offset so the air just breezes it..

What kind of lights are you using? 1.5 weeks old, it should be a bit bigger..Unless your lights are too far from the plant. Could also just be its strain. But try to keep the lights within an inch or two from the plant. That will help it get more light and develop a lot more healthy because it wont use all its energy stretching to get closer to its light source...

Other then those two things it looks pretty good for a seedling. Ya might wanna get another pot lined up as well. One thats about 10'' to a foot in diameter and pretty much the same length deep. Goodluck, have a happy harvest!