you do nothing at all you take the glass from the rich dude and you are donw
you finish getting your job and when you finish he gives it to you
veus jent jyent lone lune bline
If you're talking about in counterfeit island, then after you get that job, you go into the forgery detective lab and finish the two "stations" there.
after you get a job at the museum
Put the pictures in the right category.
go to the guy near the door. talk to him.
You have to get a job at the museum after you take the underground tour
you get them when you get a job there. Talk to the assistant curator
You have to re do it. It is not that bad.
You have to swap the painting out to get the museum job. (Move each wrong painting clockwise into the next wing.) Then you take the Forgery Training to get a Supply Room key. (see related question)
Once you are applying for the museum job, don't wander off before taking the Forgery Detection training. When you finish the training, you are hired and get the key to the Supply Room.
talk to the BLACK guy in front of the coffee shop