“error establishing database” “can’t select database” errors

Hello!
I am trying to set up WordPress (I am using MAMP and I am on an HP computer),
but I can’t get past the “/wp-admin/setup-config.php?step=1” stage.
I keep receiving the “error establishing a database” and “can’t select a database” errors.

Note: I DO NOT have a wp-config file on my computer. It is not there I do not have one. I have the sample file and I’ve tried editing it but whenever I do it just breaks the website more.

I can offer any additional information needed.

Thank you!