I need help
What do you want to learn?
Why do you want to learn it?
If I asked you:
"Where will someone who has no knowledge of automobiles start from to learn?"
Would you point me towards information about what an automobile is?
Would you point me towards information about what the different types of automobiles are?
Would you point me towards information about the history of automobiles?
Would you point me towards information about how the concept of an internal combustion engine?
Would you point me towards information about electric motors?
Would you point me towards information about what an automatic transmission accomplishes and how?
Would you point me towards information about how to operate an automobile (start engine, accelerate, brake, steer, etc)?
Would you point me towards information about how to maintain an automobile (change oil, rotate tires, replace brake pads, etc)?
Would you point me towards information about how to diagnose and repair automobile issues?
It's a VERY open-ended question. Same with Bitcoin.
Without a better understanding of what you DO know, and what you are trying to accomplish, there are a lot of different places to start.