since your fairly light the stock .41 springs should be ok and you will be able to get by with just mucking around with your clickers. This will show up when going quick on a downhill over an erosion mound if it bottoms out and your compression adjustment is fully set you may need .44kg/m springs.
The very first thing you need to do before adjustments is have both the forks and shock serviced so you know they are in good nick and have oil in them. Then I would start at the standard settings,(Front fork compression 14 clicks, rebound 12 clicks, Rear shock compression 16 clicks, rebound 12 clicks.) On forks rebound screw is at top and compression screw on bottom and rear shock compression adjustment at top and rebound on bottom. Note that the specs are turn the screws clockwise till they bottom then anti clockwise the correct amount of clicks. Ride and adjust to suit your riding. Change your fork oil regularly and your shock oil at least once a year. you can reduce the amount of fork oil height (ie add more oil) but I would not go below 90mm.
Its all about getting out there and having a play,try different things, take a notepad and write down what seems good etc.
Have fun 
Ollie