hey guys and gals, im trying to do fist of guthix mini game but every fist of guthix world i go to there is no1 there same for world 2 , is there a certin world i should be in , im a member

Some worlds are 'designated worlds'. Check the description on the world select and it should say.

yeh tried that , there is like no1 in any of them

It was just a bad time. From looking at the timestamp on your post, it was nearly 2am where I live (usa) when you made that post. You'll have better luck finding people there at other times of the day when more people are playing.

Go to the first world that has the "fist of guthix" theme. If that doesn't work, go play on a non-members world.