What would the best FREE networking system for my game?

I'm creating a game that will rely decently on physics and rigidbodies.

The game's goal is to knock other players down (they are similar to cars, and the way to knock them down is to ram into them)

I tried using Netcode for game objects, and so far it hasnt worked that well for this.. I could be using it wrong though, if I am I'll look more into it.

For now, since I have no budget for this game, I'd prefer it to be able to run off of a host instead of servers across the world since those normally cost money.

I'd like to add support to devices other than PC as well.

https://redd.it/1k8vu95
@r_Unity3D

Who's That Digging? prototype, now with enemy speech bubbles!
https://redd.it/1k93pdb
@r_Unity3D

Learning Compute shaders and created this inspired from Tarodev. 5 million cubes

https://redd.it/1k94aa0
@r_Unity3D

Free outline shaders for Unity 6+ from my project It's All Over

https://redd.it/1k96py2
@r_Unity3D

Been working on our VR game for 5 years on and off. Just released a major update. Do you think this is an improvement?

https://redd.it/1k951pg
@r_Unity3D

Modelling was entirely done using Probuilder, lol..

https://redd.it/1k98658
@r_Unity3D

Broke Main Menu

Started today thinking I’d just “tweak a few things.”
Twelve hours later, I’ve redesigned half the level, added new enemy behavior, and somehow broke the main menu.

No plan survives contact with the project. But honestly? I live for this chaos. Every little improvement makes the world feel more alive.

How often do your “small tweaks” turn into full-on work sessions?

https://redd.it/1k95clr
@r_Unity3D

Dynamic positioning for melee units

https://redd.it/1k9bb6e
@r_Unity3D

Another update on TrueTrace, my free/open source Unity Compute Shader Pathtracer - info and links in replies

https://redd.it/1k9b0jo
@r_Unity3D

Trying out a new noscript for JRPG parody game, is this one better, the old one, or neither?

https://redd.it/1k9f6eo
@r_Unity3D

Casually browsing all my Prefabs and their Components as a spreadsheet
https://redd.it/1k9geef
@r_Unity3D

Best way to learn C#?

How to learn C# for 2D Unity games, whats the best method, is it some course, some youtuber (if so please give me the name), forums? I have almost no prior experience with coding (i know some absolute basics of python like add 2 numbers which the user inputs and a little bit of LUA from Roblox Studio when I was a kid). I want to be able to make games on my own with little to no help in terms of tutorials.I want to learn it for free, and if i actually follow the method how long will it take me if Im dedicated? Thanks in advance!

https://redd.it/1k9hhnq
@r_Unity3D