I assume you know how to write your own HTML. If not, you have to learn that first. CSS and a little JavaScript would be helpful eventually but not needed to move on to the next learning steps.

Use PHP and MySQL because they are free and widely available.

Follow through some w3schools.com tutorials to study PHP, MySQL, and get that stuff installed on your computer. Get Apache HTTP Server installed on your computer along with PHP and MySQL. This will help you test and debug your practice projects as you learn.

Learning PHP and MySQL can take a while but nothing worth having comes without hard work.

Eventually, publish them to a free or paid web hosting service so they can be shown to potential employers and made available to the general public.