I want to try my Access DB into Joomla but the latter is only compatible with SQL, what's the easiest + quickest + idiot-proof way to convert Access DB into SQL?

well seeing as Access is a variant of SQL I'm confused, unless you mean the Joomala only works with specific SQL engines

there use to be a tool called dbtools which would do the job pretty painlessly

failing that you could explore the MySQL Migration tool

failing that you could export the data using CSV files or simialr, and then load the data within MySQL

You could also load it as SQL.
Try to find if access exports sql

maybe ~you~ should see if Access can export SQL, before you suggest it

Hey, if anyone is interested I managed with a very idiot-proof (the idiot here being me) software called bullzip, pretty quick too