You have explained very well about Crypto mining and try your best to answer each question very well. This blockchain is working on the delegated group of stake mechanism I really agree with it. You are absolutely right that there are witnesses at this blockchain who are responsible for validating all the injections at this blockchain.

You have explained in a good way about the methods of cryptocurrency mining but it's good to know that you are not involved in any kind of mining in your life as it is not much easy because you require a good technology if you want to start mining good to know about your experience and I wish you best of luck