Yeah, it runs terribly on PS4. Looking back on old videos I have saved and can't believe I used to play something so janky.
Official servers are just a slow deathmatch and are more prone to cheaters. Community servers range from being similar to official, to heavily modded servers which make it feel like a different game. Have you got DZSA Launcher? If not then download it. You can search for servers by map, and it lists the mods which each server uses, amongst other helpful info. The servers set the mod list, so you don't need to go randomly downloading mods.
I would stick to vanilla style servers with minimal mods and using the Chernarus map. Eventually you may find them a bit too easy to survive, especially if you're not too interested in PvP. In that case then I recommend trying Namalsk servers. It's permanently cold and it requires a different play style.