As a new user, can I start using Bitcoin without having to understand the technical details?
It's not good to start using bitcoin without any knowledge about bitcoin and cryptocurrencies in general. You should have a least a minimum knowledge about that, So i advise you to learn some articals in the internet and then you can use safly your bitcoin without any problems. Good luck for you.
Bitcoin is a currency and everyone has the right to use currency, I think very soon when bitcoin will become so much popular then even the illiterate will learn how to use bitcoin. In fact it is the need of the time and when time will come everyone will be the using it as a normanl currency.
It seems to me that you are exaggerating the possibilities of bitcoin as a currency. High what term can be applied to bitcoin is that it is tender. What to spend bitcoins on goods must first change it to Fiat creates problems especially for beginners. It seems to me that this feature deters many potential users of bitcoin.