Hi @Lauren
The advice from @mvdbeek is very good. Unless an advanced admin configuration is needed for some reason, using all defaults can be a simple method to get a single-user local Galaxy instance running.
These instructions in prior Q&A explain the first steps when setting up a local under OSX. You might choose to start over, following the help, to see if that works for you. Example step-by-step for a basic local Galaxy install with an admin account created
The most current version of Galaxy is always listed here: https://docs.galaxyproject.org/en/master/releases/index.html
For even more administrative help, including tutorials and training resources, please see: Local Galaxy: Basic Question -- Installing more tools