This can be achieved alot easier and faster.
Simply apply a Gausian Blur to the object, doesn't matter how much, although, the more you use, the better the glow, then go
Edit --> Fade Gausian Blur, then set to Either Overlay, Soft Light, or Hard Light
Your tutorial shortened to 3 steps.
Also, you might want to work on making your tutorial text easier to read. The text is too small.