I want to develop a turn-based MMO but cant find a networking library that fits my constraints. (mostly: easy to use, quick to set up, no need to understand the "technical stuff".) Is there any Networking library for any reasonable programming language that is really easy to setup and use? The performance of the networking is kind of irrelevant. I tried SFML but it felt a bit wanky here and there and was quite a lot of effort.
Please no Unity/UE, I want to program the data structure of my game by myself.