I am a total Stardew Valley lover and I have seen so many videos of modding the game but there is not really a way to do it on PS4. If someone knows how to or something please respond. Thanks!
TModding is really only possible on PC and Android. The limitations of the other platforms make it unfeasible on console or iOS and I don't see any major changes to those platforms happening that would allow it. If you do have the game on PC or Android, you can learn more about modding on the wiki: https://stardewvalleywiki.com/Modding:Player_Guide/Getting_Started