How can I sell my game online

Answer 1

You can use steam but it costs 100$ or something to upload a game there, free alternative would be something like itch.io

Answer 2

You can create a developer account on Play Store for aprox 25$ and post ypir games there. You can get money from adds and the store gets 30% of your earnings.

Answer 3

Ovie Obevwori
If you wish to mention someone to come and answer your question, then type @ followed by the person's name in the Description area (assuming you are following the person).

Putting a person's name in thread's tags will not notify the person, in this forum, tags serves a different purpose, that is to specify context and/or subject related to the query.