Can anyone without knowledge of encrypted tech use bitcoin?
If you just want to use Bitcoin, it is no harder than using a credit card or online-banking. I suggest reading up on some safety best-practices in order to protect your funds, and to use two-factor authentication.

We have put together a collection of frequent questions new users ask. It is to be found here: I am new to Bitcoin, how can I get started?.
It is essentially a bunch of pointers to yet other questions, but should help you find answers to questions that you are concerned with now. Don't worry, you don't have to read all of them at one time or even at all.

If you want to understand how Bitcoin works under the hood, it is more complicated. However, when you think about it, so are credit cards and online-banking. ;)