First you should make sure that your rtl-sdr stick is properly connected to your c.h.i.p and that your power source is suitable to drive the chip plus the rtl-sdr. Some of them are consuming more than 500mA (which is out of spec for USB2.0) which can cause the system crashing if under load.
Connect your rtl-sdr to the c.h.i.p, login and run lsusb -t. You should see an output like the one on the screenshot below. The last two lines are the rtl-sdr stick.
So you got your C.H.I.P but unfortunately you can’t connect to a Display and you don’t have a keyboard available? This guide should help you to get started. You will connect the C.H.I.P to your wi-fi, update the software and install a vnc server to use the gui.
Connect you C.H.I.P via USB to your Computer.
Open your favourite terminal program and connect to the comport with 115200 baud. For windows you can use putty. On OSX i suggest using cu.
On OSX i am using this command sudo cu -l /dev/cu.usbmodem1423 -s 115200
If you’re connected and you don’t see any login screen just hit enter once
Login with the default credentials (chip/chip)