Issue description

Step 2 asks to "Create two PostgreSQL instances..." but step 2.2 and 2.4 create MySQL instancesl instead

Workaround:
Change the introductory text of Step 2 from 'Create two PostgreSQL instances' to 'Create two MySQL instances'. Ensure all references to PostgreSQL in the guide are replaced with MySQL to maintain consistency. Verify that the commands and templates align with the corrected text.