You can see all the current minted tokens here, keep in mind that anyone can make a token and it's essential to DYOR
https://explorer.elrond.com/tokens
ESDT is a standard like ERC-20. You don't buy them as such. Projects use the ESDT standard to create tokens that are specific to their project. You will be able to buy these project specific tokens.
You can see all the current minted tokens here, keep in mind that anyone can make a token and it's essential to DYOR https://explorer.elrond.com/tokens
They can are are being, yes
ESDT is a standard like ERC-20. You don't buy them as such. Projects use the ESDT standard to create tokens that are specific to their project. You will be able to buy these project specific tokens.
What esdt?