In Judo the most basic starter is just to set both hands to grab, hold all and contract both pecs.
Start with that and start changing things around, adding stuff.
If you're starting out, the Judo style games are the easiest to get your head around.
Also, pay close attention to what other guys are doing in matches before you, you can learn a lot that way.
But yeah, basically what Karhax said: experiment.