I'm a new player

I have some questions for eth.

What is Ethereum and how does it work?

What is the difference between Ethereum and Bitcoin?

What are the applications and use cases of Ethereum?

How to buy and store Ethereum safely?

How is Ethereum 2.0 developing and what impact will it have on the network?

What are the new and updated features of Ethereum today?

Is Ethereum a good investment for the future and why?