China DOS Union

set /p name= 【Please enter username】:
1. I want it to exit directly after five minutes
2. If the input contains spaces, pressing Enter will exit. What I originally wanted was for it to return directly to the input screen
How should I handle this?

I don't know the first one. But I know a tiny bit about the second one. It may be rather troublesome, haha. After all I'm just a newbie, so please forgive me if it's not good.
@echo off
goto 0
setlocal enabledelayedexpansion

:0
set /p name=【Please enter username】:
if not [!name!]==[] ......
if [!name!]==[] echo Your input is incorrect, please enter it again.&goto 0