This is a question often asked by impatient noobs.
The “?” should be turning into a rank at deviation less than 160. How many games is that?
On average 6 games. If you’re really lucky, 4 games. For most players 5-11 games. And more than that if you’re doing something weird.
Histogram of games taken until rank in recently registered players.
Bookmarked
The recent rank revision seems to have decreased the time needed to get a rank—at least it did per my game history. Several games that I played as “Provisional” are now shown with me having a rank (starting with a ridiculous 4k). Contrary to what my history now shows, I went into the Firstish Mod Tournament with no rank and therefore had to play without auto-handicaps. In reality, it took me 10 games to get a rank, although my history now shows only 6 (not 7, because one game was effectively annulled due to my opponent’s serial timeout).
I’d suggest new players to play 9x9. They’ll get a rank much faster.
9x9 blitz. Even faster! 
how idk how to increase rank