support

hello i am pretty new to ror and i found this really similar dodge demon model in sketchfab and i rlly like it and i got the model but idk how im supposed to like add sounds, animations and stuff to it and is it hard? what do i need to make it?

It worked before but not it wont launch is it because i putted my backed up content and textures back in when i reinstalled it? And yes i reinstalled it TWICE