Just for a bit of balance regarding time to command.
I waited 8 years.
Command courses are running this year for F/O's that have been in the company as low as 4.5 years.
Many captains are not contemplating going back full time when that happens in the next couple of years.
Some captains will retire early rather than go on the 737 max when it arrives.
Some are now considering part-time working, now that it is in a more agreeable format.
Also, the fleet size maybe 30 but probably towards the 45 including firm orders.
We aren't as competitive T&C's wise, so the churn of F/O's might be higher than in previous years. (When it was quite high anyway).
Also, there would presently be just 183 F/O's above you
That's a positive spin on things. Possibly, reality might be somewhere in the middle.
If you really want to know the time to command, get one of these: