About Database

Thank you very much Ben Turner for your answer! (Excuse my bad English). I am a beginner and cannot work inside the database. I downloaded without understanding Sequel Pro but I don’t think I managed to install it.
I downloaded Local on my Mac OS 10.12.6 and failed to create the site: “dessinpierrebrody”. I erased it. I updated my Mac to OS 10.14.6. I failed to create the site “sitedepierreBRODY1”. I posted 2 help requests in the “support” category that noone answered. Do I need to activate the TablePlus add-on for this to work?
Is the database in TablePlus in MySQL 5.7.28?
My goal is to improve from scratch my Wordpress site which is hosted in MySQL 5.7.28
Capture d’écran 2020-12-01 à 14.22.40