How to make a landing page in joomla?

Question

PHP

There is a blog on joomle, they asked me to design an intro (entrance page), and they decided that I was "you programmer".
How can I make completely different content on the main page? That is, remove the standard site structure and display an intro?
All content is generated in a wrapper, that is, can you somehow remove everything on a certain page and show the module with an intro?
I'm just not familiar with either php or joomla, now I'm sitting and sorting it out.

Answer 1

<?php $main =(JURI::getInstance()->toString()==JURI::base());?>
//check next
<?php if ($main):?>
//for main
< ?php else: ?>
//for others
<?php endif; ?>
or turn off all modules except for the one you need for the required page.