Starting slow, easing into the hobby or dive right in

Hi people

I got all the parts in and as usual did the deep dive into soldering but I’m stuck… and I have to return the soldering iron on Monday.

For my keyboard, based on the DZ60 PCB from KBDFans, I’m after this layout:

From what I understand (and hopefully did so correctly) the PCB supports this, if you choose the correct plate and to my knowledge I did. But I don’t have the keycaps yet, as I’m undecided between Dracula, Phosphorous or Ursa.

But this PCB has so many holes, I’m not sure where to solder the switches in?

I know the “up” arrow switch should be more to the left. First I put it in incorrectly and to make it even worse, I forgot that one was in the wrong place and soldered it onto the board :joy: So I’m going to get desoldering wick to get it out and place those two correctly. But the capslock, left shift, left OS, left ALT and spacebar are a bit unclear where to solder them.

Left shift should be a 2U in the end and the spacebar a 6.25 if I remember right.
Another question is if I buy the GMK Phosphorous Core kit + spacebars if I have everything to cover this layout/board? I could buy the ortho as well, to have the 1U right shift, but I can use one of the “dot” keycaps for that?

TL;DR
1/ where do I solder the remaining switches for the example layout?
2/ is the “core” set of phosphorous + spacebar enough to cover the entire board?