Cryptocurrency is not yet as popular as we would like. But there are online platforms that can help you. also you can use the forums of cryptocurrency holders.
Selling Bitcoin P2P at an in-person location is also a possible method. Some online platforms facilitate selling BTC in person for cash, while parties may also simply choose to meet up with friends or family on their own and sell Bitcoin for cash. Selling Bitcoin in person requires you to understand how to send Bitcoin and work with a crypto wallet, or the platform on which you hold your funds (such as if you hold your funds on an exchange, for example).
I use online exchangers to buy or sell cryptocurrency. This is the fastest and most convenient way I think. I myself choose where to carry out the exchange and what conditions are more acceptable for me. I use BestChange to find exchangers. For example, here https://www.bestchange.com/litecoin-to-visa-mastercard-usd.html I found an exchange for ltc to usd. BestChange has information from more than 440 exchanges. This saves my time.