This is a short list, but it will take a few days to get through the entire thing, assuming nothing goes wrong (something will go wrong)
...
for each version of php, you'll have a php.ini file. set the
memory_limit = 256M or 512M
You may also need to raise the file size upload.
upload_max_filesize = 10Mpost_max_size = 10M
Also do part 2, but only the MariaDB section
Final steps
Make sure to add the 'sites' folder to your finder sidebar
Put the Application Inventory in your bookmarks toolbar
Make it all pretty (you don't have to use the dracula theme, but this link will show you the basics of adding themes)
Something has gone horribly wrong!
Read some docs, read the comments, and google, google, google.