Curious of some the background of the birth of crypto....

Hello everyone I am new to crypto. And I was very fascinated on how it really got started. I have a very vague high level idea of cryptocurrency is and I have a very high vague understanding of the blockchain. I have some questions though based on the history of how this got started...

1) when the first cryptocurrency Bitcoin was created did it also create the blockchain at the same time?

2) when this currency got created how do people know about it? How do they know how to use it, or how to operate it, or how to trade it, or how to mine it etc? Since the person created it was never found...

3) does someone have a good tutorial video about, not trading, But how crypto works at like a programming level? Like for example, how does mining work, how does the blockchain keep record, Where's the blockchain stored? Where's all the information for these transactions stored? How is more crypto being made in the world or can we run out of the particular type? How was the math/algorithem involved with crypto even created cause that must be extremely hard...stuff like this....

Sorry I know its.a lot but it's so interesting!

Thank you