Shooter + Multiplayer [C++]?

Question

Game development

Hello (Beginner developer)
I would like to make a game Shooter + Multiplayer and Anti-Cheats I
thought to take SOURCE 1 and didn’t master it and they say it’s bad for a shooter
And I decided to do it on UNREAL ENGINE 4
So:
How to make multiplayer and single-player map selection, etc. (Menu for everything)

Answer 1

I thought to take SOURCE 1 and didn’t master it and they say it’s bad for a shooter

I also think that csgo is a so-so shooter *sarcasm

How to make multiplayer and solo map selection etc (Menu for everything)

https://docs.unrealengine.com/en-us/Resources