Advanced 3D Light Rays in After Effects/Cannot Rotate 3D

Hello,

I am new to After Effects, but have come quite a long way with a tutorial on making a 3D light ray. Here is the tutorial I am using: Advanced 3D Light Rays in After Effects! - YouTube

I am stuck on time marker 5:50, where it wants to push the Point back behind the white light. When I try to use my rotation tool the way he does, my whole image only rocks back right to left. There is no 3D rotation at all. Therefore, I am having a problem progressing. I have tried different camera views, but it will not allow me to move my Point when I do that.

Any help would be greatly appreciated. I am sure it has to do with me not being familiar with the basics, but I do not want to give up on how far I've come with this! I'd like to finish it. I will go back and learn the basics when this is over instead of tackling such a huge project.

Thanks in advance for your response(s)!

-Sarah