Like Electovoid already said, it is not really a good idea to start a tournament without a staff, schedule or rank limitation. Most of the players who register will not participate in the end due to the schedule that was not released earlyer.
I haven't organised an osu! tournament yet, but participated in quite a few and already organised tournaments for other games. So I would also offer my help, because I think that tournaments are a huge part of osu! and it's good to see that there are so many people willing to organise a tournament. Just PM me when you need my help Rgds Cedo
I would help pick maps for mappool since i fanboy a lot of mappers and talk to a lot of both veteran and up-start mappers, but im registered on the tourney and i can make it biased for my team haha. Try to ask around instead of waiting for a volunteer