The easiest way is to use exchangers. To speed up the exchange process, use the BestChange service. There is a convenient search system for a large number of exchangers. It works simply, for example, you enter the usdt to usd currency pair and study the offers https://www.bestchange.com/tether-to-dollar-cash.html
This is how you can find information on any cryptocurrency.
I became interested in cryptocurrency because of its popularity today. I monitor sites with various offers and opinions. What do you think of bitconnect? In 2018, a US court froze their assets, and now they are trading their crypto again. Do you think I should invest my savings in their currency? In my opinion, it is growing well, but how it will behave in the future is unknown.