I was expecting that to, but from experience here normally the actual process is usually different from place to place and who you meet on the offices. So most of the times it's better to wing it and just go there and stand in line and do what they ask, pretty much everything always had a solution on place for me. There's a million opinions and people that want to sell you solutions online, my advice is to always just go directly to the source and comply to what they ask from u.
yes only the norwegian license, got both in Thai. No driving test or anything, not a single farang there. Just went in, got in line, only copied what they asked me to and had the license in my hand in like 2-3 hour.
I have norwegian license and just got the Thai, super easy task and no need to pay anyone. Get your residens papper from immigration or the norwegian consulate and just do a drop in at the driver license office. You'll have the license in your hand in a couple of hours, bring your passport, driver license and take copys of everything there. Cost me 105 baht for the license and only did sight, colour and brake test