Best move you've made thus far is finding your way to the forum. For that I would say a big welcome to you and hope that your stay here be a pleasing one.

You've got a lot of questions and it's important that, you take it a little bit slower I would suggest. It's good coming as a blank slate and that means, you are teachable and you seem eager to learn as well. Give yourself the time you need and don't shy away from anything crypto related. When you see something related with bitcoin, read them and make meaning off them. Search out the meaning of terms used and you just might get in line with your need to know.

Why Bitcoin is invented?
You can as well take your own reasons but, its mainly to ensure peer 2 peer services without any interference from the government. It helps t ensure quicker transactions across the globe and a more digital operation in finance.