In your rc:
alias ..='cd ..'
alias ...='cd ../..'
alias ....='cd ../../..'

Usage:
1/2/3 $ ...
1 $

Excellent move. To increase your chance of successfully staying off TikTok, think of the transition not only as stopping TikTok, but starting something else. This something else is for you to determine, and should take up some good portion of your new free time, at least at first.

Think out of the box

Related, there’s some evidence that forcing a smile can improve one’s mood.