“Error establishing database connection” – I have 2 WP Installs

I’m a total beginner – please bear with me

I did successfully a website for my brother’s restaurant, now I’m trying to do a second website for myself.
I’m using a macbook pro, MAMP 4.1.1 and bluehost hosting service.

in my htdocs folder I have the folders wordpress1 (for my first website) & Chamonix (the one I’m trying to do)

NOTE: In the hotdogs/wordpress1 folder are the following files
index.php
license.txt
wp-activate.php
wp-admin
wp-blog-header.php
wp-comments-post.php
wp-config original.php
wp-config.php
wp-content
wp-cron.php
wp-includes
wp-links-opml.php
wp-load.php
wp-login.php
wp-mail.php
wp-settings.php
wp-signup.php
wp-trackback.php
xmlrpc.php

When I go to phpMyAdmin, I created the DataBase Chamonix
and try to do localhost:8888 and get “Error establishing a database connection”
try localhost:3306 and get “Safari can’t connect to the server”

NOTE 2:
Host localhost
Port 3306
User root
Password root
Socket /Applications/MAMP/tmp/mysql/mysql.sock

I’ve looked in the help of WordPress and doesn’t say anything about the file structure to have two or more wordpress installations in your macbook.
Can someone help? I’ve spent a week looking for info in the topic.

*Can’t add screenshots*