Choosing and developing a server for games like 2D strategies on android (client side on unity)?

Question

Android

Good afternoon!
Help in choosing a network solution for the game.
In the game:
1. Construction of buildings.
2. Several types of resources.
3. Authorization through Google.
4. Several types of inventory (inventory with heroes, with items and a few others)
5. Battles (without online interaction).
Roughly speaking, the client sends arguments to the server, where they are processed in a function, and the result is returned to the client.
In fact, users do not see each other, in connection with this, real time is not needed.
And the standard Unity solution is also not very suitable (it seems to me), since the game is not a session game.
Prior to that, I only practiced with offline games on Unity, and this is the first attempt to create something with online functions.
The main goal is to choose and learn networking in Unity.

Answer 1

You already have the simplest task since there is no real time. Stupidly shove a request to the server in any convenient way and get the result, here even the usual http \ post request is enough with serialization into a format convenient for you (for example, json, if the sizes are significant, then gz and sing it). In the role of a backend, even donut (php) will do just fine.