I got to play FaF with a top ranked player Vs 8 of us low-mid tiers (and one total novice)
We were still pottering about setting up defences and he had filled his half of the map with factories and quickly killed 2 or 3 of us. We won but only because one of us had a gunship squadron going around the map edge and found his commander.
It’s quite astonishing what he did in such a short time.
It did kind of kill my enthusiasm for it though, an excession event where you realise you are just a pathetic minnow. Humbling
It’ll be as complicated as you need. Don’t grab add-ons because you’re shopping for “stuff”, write down your apps functionality and decide how you want to implement each thing.
You only need sqlite if you want to store a lot of data, I’d you don’t have much data you c ok ukd just do it in code. But if you want users to add and save things then you could use a JSON file instead… or any number of other solutions.
If you don’t know how to approach software seeing an example won’t help because all the thinking and planning was done out of sight.