Can you help with provide of code to make a limit order buy on Spot and limit/market buy order on Futures?

Hello. I'm just getting started with this library and not very familiar of how to do things with it. I didn't find any example of code of how to place orders and make buys.

Can you provide an example of buying BTC? From start of authentification, listening channels and make fast as possible bought. Both futures and spot markets?

There are some code examples here and here