If you are new to bitcoin and searching for the convenient ways to buy/sell it with or without KYC/AML, I would recommend you https://bluewallet.io/. It is a mobile wallet, which has recently added an option to trade bitcoin peer-to-peer through a well reputed service HodlHodl. What you need to do is to create a wallet, deposit some bitcoins you wish to sell and than search for buyers near you. You can sell bitcoins for cash or use bank transfers for example. However, you need an account on HodlHodl to start trading. Look at screenshot:



Another great service to buy/sell bitcoins without KYC https://localcryptos.com/.