I am new here to this website, this being my first ever post, and brand new to model ship building as well! Before I pose my question(s), I have to say that you folks do some fantastic work
I have always been interested in World War II warships, especially from the Pacific theatre. I have selected for my first build, the Tamiya 1/350 Fletcher Class Destroyer (DD445).

Aside from adding some PE details from the Toms Model Works US Fletcher Class Destroyer Detail set, I intend to build it straight out of the box, full hull and all.
My only real problem is deciding how far to assemble the kit before applying paint? For example, the Tamiya plans call for a �Hull Red� lower hull, a �Dark Grey� base color upper hull, with a wavy �Sea Blue� camouflage applied over that, all of this separated by a thin �Flat Black� line. Do I paint all of this prior to attaching the deck (I am using an airbrush btw) so as to avoid having to mask the bridge, guns and other topside areas, which are a different color? Here is a picture of the plans.

What about the deck and all upper portions of the topside sections, when would be a good time to paint these areas? What I mean is, if a person were to be looking down on the ship from directly above, the Tamiya plans call for these areas to be painted a mix of one part �Hull Red� and two parts �Field Blue�. However, the sides of the guns, bridge, funnels etc are to be painted �Neutral Grey� with �Dark Grey� wavy camouflage. Here is a picture of what I mean:

Would I paint the deck topside it�s color before adding the bridge, guns, funnels etc, and would I assemble and paint the sides of the bridge, funnels, guns the �Neutral Grey�/�Dark Grey� camouflage before attaching them to the deck? In other words, making many different sub-assemblies and once they are done and painted, bringing them all together at the end?
I hope this is making sense! In essence, I was wondering how far do you folks assemble your kits before you begin painting them? It seems to me that assembling the entire kit and then painting it would make masking difficult and almost impossible. So what do you all do?
I apologize for the long-winded first post, and if my question(s) seem both confusing and/or overly elementary. I am just quite excited to begin this first project but I suppose I am a tad overwhelmed and unsure as to how far I should proceed before I begin/need to start applying paint.
I thank you all very much for any and all advice!
Kindest Regards,
Don