When you start learning, you have a free character with which you learn the rules, words and go through the story. During training, you earn LSTAR tokens.
After 3 days, the free character becomes unavailable.
To continue to learn and earn you can buy a character on Marketplace (https://market.letmespeak.org).
You can also rent a character in our Scholarship system (https://market.letmespeak.org/#/scholarship).
When a certain amount of LSTAR is earned (at least 300), you can exchange them for USDC on our marketplace: https://market.letmespeak.org/?lng=en#/swap
If you have any problems or something is not clear, please let us know at help@letmespeak.org - we will definitely advise and help you.