Here you can ask questions related to this specific course section.
When a token smart contract is just created, how do the tokens circulate among exchanges?
In case of a dex, the creator of the token has to provide liquidity, for a cex you will need to contact the exchange, surely pay a fee and provide liquidity to it.
can you just copy the standards of an erc20 tokens to let’s say a bep20 tokens or are the rules always different?
You can check the docs for both of them, I am sure Binance provides an accurate breakdown of the BEP20 standard.