Just to give the other side…
It’s a very long time ago now, but I did my CPC remotely - in fact, I did it in the lorry while on deep sea containers. I’m also someone who learns better that way, and I passed it first time, so it can be done. Module 4, as it was then, the case study paper, was difficult to practice for, but there are plenty of past papers out there, and these days you have video resources online as well. The only thing I will say is that I was actually already running six trucks by then, real life experience that made many of the principles easier to grasp.
I gave myself three months to learn it all in, then procrastinated like a fool and ended up cramming it in one, having first removed any other source of entertainment from the truck…but I was younger then and that was when you could do Freight National as a standalone, so that’s one approach I wouldn’t recommend now! 