It depends on how much effort you want to put in. For starters, a good and easy counting system is KO. Order the book Knockout Blackjack by Olaf Vancura and Ken Fuchs at the store on this site.
After you read that, read Blackbelt in Blackjack by Arnold Snyder for a look at some alternate and more advanced systems.
so the 3 are about the same in effectiveness? but the kiss III you dont have to convert to a true count so it is easier? but i got like 3 years to practise so i want a good and effective one so in 3 years i can go to the casino and win.
Counting? To do that 100 % accurat there are not more than a few weeks of hard practicing! Go to the casino and back count to see if you are fast enough.