Actually it is not our party.
There are two levels of activity within Flux, registration which earns one the right to vote on issues that a Flux representative will take to parliament, and membership of the party, You do not have to be a member to register to vote. And as you say, registration could reach massive numbers in a few years if the rollout captures the public imagination.
So direct democracy will be operating at the registration/parliamentary voting level,
However, there is a clear statement that Flux the Party will NOT be using any direct democracy model and so will remain an autocracy. There are good reasons for this. Max and Nathan have to be "the keepers of the vision" particularly as few people have direct experience of DD, but personally I think they could do that by retaining a veto function and then allowing party members to have some contribution to party direction. Currently this is not the case, and there is no projected timeline that I have found for democratisation of the party.
To me there is an inherent catch 22 here. People who want direct democracy are unlikely to function well within a party structure based on autocracy. This is going to have the inevitable outcome of alienating supporters of DD and rewarding power players at the party room level. Others have raised this issue, but I cannot point you to those conversations. It's a big topic.
And although the party does not have a position on policy issues, there are many statements that taken together are an ideology behind Flux. So far I have found, in the various bits of documentation that I am attempting to compile, philosophical, social, political and economic ideological positions, and these are significant.