Luckily, creator Ryan Murphy is here to help. On August 16, Ryan announced on Twitter that “Blake's character will be in Ohio starting episode 5.”
We’ve always assumed that Blake would be a student at McKinley, especially since Glee writer Michael Hitchcock tweeted, “A hearty congratulations to the very talented @Blake_Jenner. Welcome to McKinley!” right after the finale. However, Ryan’s new tweet does seem to be alluding that Blake could be a Warbler, instead. Wouldn’t that be an interesting twist!
In any case, Glee has just finished filming Episode 2, so Blake likely won’t be having his first day at work for another couple weeks.