Start with learning about bitcoin as a basis. You can find plenty of info online about it and how it works. That knowledge can help you to easier to understand cryptocurrencies in general. Then, research about other cryptocurrencies, compare them with the bitcoin. All of them are pretty similar to each other. You can find a lot of info about bitcoins since they were one of the first that appeared on the market and introduced the term cryptocurrency. If you are interested in investment in general, here is a website for you https://investotrend.com/fundrise-review/. They explain everything about investment, including cryptocurrency and how do they work.