First of all, welcome, and congratulations because that is a really poor kit.
You are correct that there's a good reason to start with something at a smaller scale. Since you would like a war ship; I'd suggest a couple.
There's a new Airfix Wasa, plus their Victory. Revell Don Fernando, little Constitution and Victory.
Heller's fine. My only quibble is that often their masts and spars are too flexible.
Their Real galley is stunning.
Revell makes/ made a nice batch of other sailing ships: Bounty, Morgan, Golden Hind, Viking ship, Mayflower and Cutty Sark.
If you ever see the big Constitution at a price you like though, buy it. It's very user friendly and builds up into a superb, BIG model.