There are no secret words or anything of that sort, you cannot buy crypto in that platform. Cryptocurrencies are bought and sold in crypto exchanges and that is the services you should look for if you want to buy crypto and not ebay. There are two types of exchanges, the centralized ones that collects data about you before you can trade and is in custody of your coins at all times, and there are peer to peer exchanges that are the complete opposite, no KYC, no third party, no centralized control, etc. Thus which of them would you like to use?