Re: switch to foundationless AND mediums - when and how?
I'm really new also, so I'm just saying what I would TRY. 3 options.
1. Put a med above the deeps and wait for the queen to start laying up there and then queen exclude her up top, let the brood hatch, which might have drones which is why I'd have them under, and then remove the deep box.
2. Hang the deeps that the bees are using in 2 med boxes and have 2 meds stacked on the sides. They will start moving out to the outside meds and you can start replacing 1 deep at a time with 2 meds. I started with a 5 frame deep nuc so this is what I did. I only had the 5 deeps that I got so this was my only option.
3. You said that they just swarmed and that the queen hasn't started laying, so pretend this is a swarm also and just take off the deep, which shouldn't have many capped anyway, and just remove it. Put a new med box on the bottom and shake the bees into it. You will have to watch them close for a little while to make sure they are drawing straight comb, but it's just like starting with a swarm.
I might go with wax foundations for at least half of the frames just to get them to draw straight. You can have them just in the middle or every other one, think both would work.
Personally, I would just add a med to the top and let them draw it all out and wait till winter when they move up to it to remove the bottom deep. My bees use 3 meds boxes for brood so they should move into 1 deep and 1 med pretty easy.
Disclaimer: I know enough to know I don't know anything yet.