Get a big 3 kit to. You should be able to support 2000-2500 at mostThe only upgrades is the battery and 0 gauge wire running to the amp
The big 3 kits are pretty easy to install and they help a lotI don't know much about car audio. I think I did the big three kit on my truck. My friend installed most of my sound system and he's no expert either.
That's a big 3 A good agm battery also will helpI have 0 gauge running from my alternator to my battery and two grounds one running to the chassis and the other to the engine block.