Question, is thhis to be an OOB (Out of the Box) build?
That will affect advise we give yyou here. Some.
Can help with some things, though. The breeching line around the end of the cannon needs to be long enough to stop the cannon so that the barrel is clear of the inner bulwark in full recoil. It's slack when the guns are run out.
Which gets to an OOB issue. The kit hull is about 3mm thick, shy of 1/8". The actual hull uses frames close to 18" thick with 2-3" thick interior planking and 4-5" outer planking (8-10" at the wales). So, the hul need to be closer to about 1/4" (6-7mm) thick. And, it's rather late in the process to fuss with that.
Tiny point of order. Woodne sailing ships, despite being in water were dry as tinder, flammable stuff was kept under close supervision. Powder was keep deep i nthe hold, and through a number of pass-throughs. Powder was not loose but bagged in linen or silk bags
The other issue is that, sailing ships were, to pick a simple word, "tippy." As in enough to tip over a standing barrel unless that item were very securely lashed down.
Now, there is a legitimate, and scholarly, debate on whether the spare spars wer actually carried lashed to the bottom of the boat beams i nthe hatch.
One of the things that Revell does not tell you about the ship is that the anchor lines do not merely cros over behind the forepeak, but, instead, travel aft along the hatch coamings to go below to the cable flat about even with the main mast.
Those lines out to be a hair strong on 1/8" (4mm) diameter. There should be another line, just shy of 1/16" (2mm) which ought to have three turns around the lower capstan drum (also neglected by Revell) which is the line actually heaved in to bring the anchor line aboard.
(That smaller line ought to run through a pretty big single sheave block well forward, which would be near-impossible to see, making a continuous loop.)
Dagnabit, I meant to keep this simple and short.
Oh, an if you want an option for the decks, they were made from different kinds of wood. Oak under the guns, and pine for the rest (I think) Even today, ther eis a two-tone effect.