No more difficult than Yahtzee

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We play our own set of rules so YMMV on what they actually do...
We only play 1 game--too much socializing going on

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There are 6 rounds per game....
There are 6 numbers on the dice...
First round you try to get 1's...
Second round you try to get 2's....
So on and so forth.
We play to 21--when the head table reaches 21..the game is over. Your team wins if they are the higher score (or if at the head table, you reached 21).
We do Bunko's and on the town's---
our house rules...."on the town" is all the dice the same number. Automatic 5 points for scoring and you get to roll again. "Bunko" is all dice the same number as the round you are on (so on Round 1, you roll all 1's....Round 5, you roll all 5's). We score an automatic 21 points for this. For the head table--the round immediately is over...for the other tables...you just have a massive lead.
Rules may vary according to the house--but that is the basic idea.
There is always someone who knows what is going on and how to score--so if you lose track...there is always some help.
HAVE FUN!!!