This type of thing would only make sense if you’re in it for the fun of building a modified car. No offense but if you’re asking basic questions like this, it’s not a project for you.

If your goal is to have a car similar to yours but more powerful, it’s going to be far easier and more cost effective to just trade in for different car. Some of the newer Mazdas come with turbo engines, putting around around 230-250 hp. Not a “fast car” by modern standards, but significantly quicker than what you have.

Maybe put a supercharger later

Trade your 2020 2.5NA for a 2.5T lol

This is going to sound snarky, but your least expensive option is going to be to trade your naturally aspirated 6 in for a factory turbo 6.