How long does LTA takes to inform us of second interview?

I had the informal interview and was told to wait 3-4weeks if I am shortlisted.

I also had an interview at a ministry, the HR told me will get back to me in 1-2 weeks time. But this is directly a panel interview with the director and DD.


Lastly, if an offer is given, what is the typical timeline thereafter? Reason is I want to get out of my current workplace because there is really no more growth for me here. I am still holding a diploma job with a degree here.