Time is a dimension, but not like space

If I understand correctly, we experience time at nearly the speed of light. What I mean by that is that any particle’s 4 dimensional velocity vector has the magnitude of c which means that if it is mostly at rest in space then time has to be the major contributing factor but the magnitude of the vector. On the other hand something like a photon experiences to time at all as it moves through the 3 space dimensions at a total of c.

I believe that’s an accurate model, with the caveat that it’s all relative. There’s no universal reference frame. So for the photon and his pal photons, they experience time while you (in your reference frame sitting still) are the one moving at the speed of light and not moving through time.

Edit: See below, the photon doesn’t have its own reference frame so they still don’t experience time.

I still don't get it, photon comes into existence and then slams into a thing for us to notice the existence. Between the being born and slamming into something time passes, no?