bitcoin difficult to understand because the bitcoin coin is first digital currency and most probably human not understand .and if you really want to know so go on youtube ....there have more videos of bitcoin.
Yes, bitcoin is difficult to a beginner in the world of crypto currency cause you need enough knowledge cause it not easy to start here if you don't have basic information how to invest in digital currency it may cause lose your money. There is lot of resources and instructional materials you can use like reading articles on the forum or watching in you tube it is very helpful before you start to invest.