Help on setting up Rega Planar 3

Hi everyone, just got a rega planar 3 and i'm not too sure how to set it up. I have an audio technica cartridge that I will fit onto the arm its the at-120e. This is my first real audiophile turntable so i'm noticing some differences with other turntables. I noticed that the counterweight has to be slided in on the rb-300 arm instead of turned which I find kind of neat. Also, i'm not too sure what the "dot" represents on the anti skating knob. Would also like to know how to set up the cart with the arm correctly. If it helps here are the specs of my cart :

Frequency Response 15-25,000 Hz
Channel Separation 25/20 (dB at 1 kHz/10 kHz)
Vertical Tracking Force 1.0-1.8 grams
Stylus Construction Nude round shank
Recommended Load Impedance 47,000 ohms
Output 5.0 (mV at 1 kHz, 5 cm/sec)
Channel Balance 1.0 dB
Stylus Shape 0.3 x 0.7 mil elliptical
Cantilever Alloy tube
Mount Half-inch