There are a few ways to keep your privacy using Bitcoin. First is buying Bitcoin using no KYC which you can read about that HERE.
If you just purchased and have bitcoin on like Cash App or Coinbase well it is not a non KYC but you can still employ best practices for your own privacy. Transfer it to one of the wallets below. We recommend using BLUE Wallet and using the Payjoin feature, when sending in BLUE Wallet make sure to toggle on the PayJoin option before you hit send.
Make sure you use a Wallet with some privacy features. A few below.
Sending a PayJoin in BLUE Wallet Video.
PayJoin is a collaborative transaction between the sender and the receiver of a payment, for example the merchant and the customer. The goal of the protocol is to break the common input ownership heuristic, while making it difficult to fingerprint that the transaction is in fact a CoinJoin. Further, it reduces the transaction fees paid by the merchant due to consolidation of coins
Advantages of PayJoin
First and foremost, the common input ownership heuristic is broken, meaning that the inputs do not belong to one single entity, but to several of them. This breaks one of the most important assumptions of transaction surveillance companies. Contrarily to other CoinJoin implementations, the outputs are not of equal value, so it is not obvious that this transaction is in fact a CoinJoin.
Here are some links to go down the rabbit hole of Bitcoin Privacy