Specially for newbies there are no exchanges and it would be strange if they existed  . But there are exchanges where you can quickly and easily figure it out. In my opinion one of the most convenient is Binance. Also quite comfortable is the Poloniex. The interfaces on these exchanges are friendly, so it’s easy for you to understand what you have to do. In general, everything is quite simple. You need to enter the real exchange site (beware of phishing sites), create an account, go through verification and be sure to enable two-factor authentication. After that, you can transfer a small amount of money for practice. Before you transfer money to your account, make sure that you use the address for the currency that you transfer, and also pay attention to the fact that there is a minimum amount of transfer. Don't transfer the amount less than the specified.