How difficult will this project be?

Question

Game development

I want to make cross-platform tic-tac-toe (windows-android), with multiplayer, of course.
Will I have enough knowledge of kivy and the socket library for this? What skills might be missing?

Answer 1

If there are questions, then, most likely, knowledge is not enough. Otherwise they would just do it.
A multiplayer in general is not a trivial thing. Even in such a simple game as tic-tac-toe.
Offhand questions that you probably missed:
1. Design. Talk about frameworks, but 70% of game development is interface.
2. Funding and administration of the server. The maintenance of a game server costs money, and the question of monetization of one of the thousands of implementations of tic-tac-toe is doubtful.
If we omit such reasoning, then the easiest thing to understand if it will work out is just to do it. At the very least, get an interesting experience. Perhaps later it will come in handy in a more interesting project.

Answer 2

1. Win + Android is not quite cross-platform, i.e. already easier
2. You will need a backend that you can try to write yourself, or use "backend-as-a-service" services, including serverless, or find a separate backend developer
3. You will need 1 or 2 UI frameworks (either one that works on both platforms, or one for each)
4. You will need to think through all the rake that you can imagine at the first stage of design, in terms of attempts to cheat the backend. And then collect another rake that you did not know about, but which you will learn if you monitor servers and client applications.
0. Take it - and do it, then you will deal with problems or quit.