Jambalaya is more than just the main meat and rice. Not having trinity in a cajun dish is sacrilege (bell pepper, celery, and onions). You're missing out on sausage, preferably andouille but if you can't find it in your SEAfag shithole, you can settle with whatever spiced sausage you prefer. There's also garlic and your choice of pepper, most recipes will say cayenne pepper but you can use whatever works for you, jalapeno and habanero are both viable alternatives. Be sure to include the seeds for the extra bite.
Considering you're doing a seafood jambalaya, you're going to need a light roux unlike with chicken jambalaya because you're trying to counter the juices with the seafood. Dark roux only works for chicken because that's a stronger flavor but with seafood, it will easily overpower the flavoring of the entire dish. Perform all your prep work cutting and dicing everything before you even start the roux because it can quickly turn from okay to burnt if you stop stirring, which will make your entire dish taste like shit. Since you're making a seafood jambalaya, you can add tomatoes to the whole thing when you added in the trinity.
I'm not going to teach a SEAfag my recipe. I'm also not a NO fag, so I usually make chicken jambalaya, not seafood jambalaya. It's a bit different but not that much, just a few key differences in the ingredients and cooking process.