Create a multiplayer physics game

I would like to create a multiplayer physics turn-based game (like tank game that involves strength control + wind control) to my school and I am a little lost about it. I already create a simple multiplayer game, like quiz, but I believe this game is much more complex. I am wondering if someone can help me, giving some instructions or suggestions, or pointing me a specific tutorial (or a similar one).

Thanks.

You make sure to use the fixed stepping mode for Physics and sending the same movements should replicate the right results on each device

You make sure to use the fixed stepping mode for Physics and sending the same movements should replicate the right results on each device

what is this "fixed stepping mode"?

It makes it so the physics is precise each time you run it, so that it will be the same on everyone's machines :)

You can set it on initialization for each client.