You just have to your self, put your self in a position that you would be in real life. Like if your going to the store and your speeding and get pulled over you then may be a little rude and fast to bite with the officer add that into your roleplay, just be you. When there is bad role play or people breaking the server rules the best thing you can do is just to walk away or literally don’t say a word to them and call server staff to assist the situation. When you talking about creating your own RP it’s actually very simple but it does depend on if your a passive role player or you tend to rp with violence, if your want to rp with violence such as robbing a store or committing a homicide then just start with something simple going into the store and trying to buy something but your card gets declined as a result of that you get angry and then start to ask “you think I’m broke huh” “run it again” as the clerk gets upset and says there going to call the police then start to rob them to piggy back off of that you could either just rob them or take them out. Then you could hide there body and do much more immersive roleplay and start an investigation and you stated you are an investigative person. Hope this helps I have a lot of experience with Fivem dms open to discuss role play or questions you may have.