Question [Q] Online Multi-Player 3D physics based android game development help!

HI I'm a beginner for android game development.

I want to make a online multi-player physics based game in 3D. Currently I only know that the graphics should be design in unity or blender,later the graphics should be integrated within the program with the help of libgdx like tools that is game engine.
I don't know how to do all the all the stuff also can i design the same android game using blender game engine if yes then how?

Please provide proper guidance and step by step information thanks in advance..
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