Which is the best language to learn to start working for freelancing?

Answer 1

It depends on which sector of outsourcing you will do, Web Development, App Development, Working with database, Data Science etc etc. Firstly, Choose a Topic you would like to work for, Then start learning the necessary languages and skills you require for that type of job. You can go through these:
https://www.sololearn.com/discuss/2223200/?ref=app
https://www.sololearn.com/discuss/1515038/?ref=app
https://www.sololearn.com/discuss/1615255/?ref=app

Answer 2

HTML