Hardly anyone ever says mysql is better. Postgres has a lot of nice features, But they’re still a hell of a lot more people out there with mySQL experience.
If for some reason you really want to go mysql I would urge you to look into percona and percona tools. It’s incredibly fast super optimized. The tools let you do backups that my sequel could only dream of.
That said, if you don’t have any strong needs for mySQL, and you don’t have any experience with it I would probably start picking up postgres.
Honestly, you just need to pick a video on follow along these days. There’s a load of YouTube videos out there that take you step by step.
Lewis rosman recently put out a 14-hour mega video of doing everything, well he might have made some controversial choices, The outcome is quite comprehensive.