Ok.
Short answer is; No, you’re not doing it wrong, the galaxies have been totally reset by NEXT meaning what you are looking for no longer exists.
There is a high chance that any co-ordinates from Pre-NEXT will not yield the results they once did in regards to what was in that system. Some Orb exotics look to have remained but that is about it.
In most cases, the ships for each system regenerated, making old info redundant.
Comms from ‘before’ are scattered all over the place & often unreachable.
Many systems are now uncharted with no space station or habitation of any sort.
This Starships 
thread was started after NEXT but is most info is only relevant to PC.
Hopefully soon, PS4 users will start posting pics & coordinates of good looking ships (as they used to do) to help others find ships they like.
Sorry for the bad news; it’s a new universe & nearly everything is a fresh start.