Welcome to FeralHeart! I hope you enjoy your time here and meet some good friends! And yes most of us are nice there are not too many rude people on here from what I have seen in my time of being part of this fun community.
As for your RP question, there are a few ways you can initiate an rp on FH! One of the most common that I have seen if you are a less serious rper is sometimes you will see some people rping in the grounds, you can ask them nicely if you can join in! Another way is find a good rp group that you fit in who does certain rps that you enjoy, they typically are recruiting in the grounds and will typically accept new members if you whisper to the person making the "movies" in the chat. Other then that, that is all I can really say. Sadly my family and I are in the process of finding me a new computer because mine has busted on me and is unfixable, so you won't be seeing me in there for a bit. But if you want to hang out or chat with me feel free!