Submit an idea to a conference
In CS, conferences are like journals in other fields: the normal medium to publish fresh results. But it is results. There might be exceptions for some specialized conferences that make exceptions.
Also, many CS conferences have a Workshop track in which unfinished work can be presented and discussed. Likewise, there is sometimes a Doctoral workshop in which PhD students discuss their ongoing research and get feedback.
But for a normal paper track in a typical conference, a completed work will be expected.