Problem with a crown stem

I made a few watches already (changed dials and hands). I starting feeling myself a little too much, and now I ran into a problem.

I was trying to put together a Seiko Presage but the crown came without a stem.

Is putting a stem and crown together achievable for a newbie? I see that the stem needs to be cut and glued on the crown. I'm worried about messing up the crown or something and ruining the project. Then I'll be screwed without the crown.

Should I try to do it or should I just find a watch maker to put it together for me? Also how much would it cost just to do the crown for me?