Now there is so much information on the Internet about crypto trading, crypto exchange. I don't understand where I should even begin.

If I were you, I would start by choosing a broker. I think this is a very important step for a beginner, so I recommend that you visit resource https://topbrokers.com/uk-forex-brokers, where you can find reviews of brokers, as well as a lot of useful information about crypto trading in general, so be sure to check this site. I'm sure you'll need it.