Welcome, Asylum's great.
Like @Shalobee mentioned, people around Asylum tend to be more aggressive, though if you stay away from the right area's, you shouldn't get robbed or killed.
However, thats not always the case, there are lots of people who would help you out when you need it (I hear this guy named @Roicesb loves to help beginners out ).
If I could give you some advice, it would be to learn the map itself, Altis is pretty big and in order to get things done efficiently, you're going to need to know your way around the map.
There's lots to do on Asylum, browse around the forums and I'm sure you'll find something interesting .
Good luck.