mojave safe mode
how to enter safe mode in mojave
MacBook Air 13″, macOS 10.14
how to enter safe mode in mojave
MacBook Air 13″, macOS 10.14
Check this Apple Support page. It should work.
To add to the above good advice, I advise you use a wired USB keyboard.
Technically since you're using a MacBook Air as described, you can use your built-in keyboard and mouse. But, if this is your first time booting to safe mode and you just want to keep it safe, you can use a wired keyboard. If you don't have one, it's fine.
How to use safe mode on your Mac provides an explanation.
I must have been decaffeinated when I typed that. 😶
mojave safe mode