stolen macbook

Good morning. My macbook was stolen yesterday when I wasnt at home. I have tried using another laptop to trace my macbook via icloud but everytime i try do so, it says that I have to set up in an iOS device before using it. Thus using a friend's phone, i managed to log into icloud and start tracing. However, the location on the map shows the position of my friend's phone, instead of my macbook. Shouldnt my macbook also turn up on the map?

Is there a way that i can lock my macbook and if someone tries to access it I would get a notification?

Please help. Thank you so much