it won't cost us even a single satoshi? How can you make profit from your service then? Is it something like donation?
This is a not for profit venture. There are costs which are affordable for now. I will bear these costs as long as it is still viable for me.
Definitely interested in hearing and learning more about this,
. Been using things like Duolingo, which have proven to be helpful, though always up for new methods to try out.