It’s difficult to quantify.
Which will be the unit measure you expect the response is expressed in?
But I can answer something that will let you know in a few steps.
1.- Go to Upwork
2.- Find jobs related to the language you want to learn
3.- Filter those jobs excluding those clients that had never contracted anyone before.
4.- Filter also jobs for Novice
5.- Between those jobs, find those that have detailed specifications.
6.- Try to solve them
The first time you can complete one on your own. That’s what you had to know to begin.
For more tips on upwork, there is a playlist in
Como Ganar Dinero En Internet con Upwork – Consejos Reales y Prácticos – YouTube
It is in Spanish but is already has English captions.