Isn't there a guide or tutorial where I could get started playing dice games?
There's not that much to it. Create a SatoshiDice account. Deposit some Bitcoin. Wait for the confirmation.
Each roll yields a random number between 0 and 65535.
You bet on how high the number will be at most. This determines your chance of winning.
The lower your bet target, the higher your potential profit.
Say you bet on 32768.
If the site rolls 50000, you lose 100% of your bet.
If the site rolls 20000, you win 100% of your bet.
The house edge of SD is 1.9%. It is realized by limiting your bet target to 64225.
1.9% is much much better than what you get from state lotteries for instance, who often take 50%, which is insane.
Personally I have won a lot and lost a lot. Had a lot of fun.