There's a great video with coffee expert James Hoffmann on making coffee in a moka pot: https://www.youtube.com/watch?v=rpyBYuu-wJI

However a moka pot generally doesn't make espresso as much as strong coffee. If you want something that makes espresso, check out the 9bar: https://www.youtube.com/watch?v=ZcZMGx15QBU

Of course you'll want a good hand grinder for either, but especially espresso. You can't get anything close to espresso with pre-ground or a cheap grinder.