My suggestion is better study PHP OOP first. You can use google or youtube for learning just search and type your thoughts. But the PHP documentation is the best way to learn, because every rule and guide lines are already there.
Learn PHP OOP first before diving to laravel. Once you are confident you understood the concept of OOP then go back to laravel.
For naming convention you can review PSR 0 - 4 it's PHP standard that every professional programmer should follow
It will take you 1 or 2 weeks to study it, Here is the link to PHP OOP. http://php.net/manual/en/language.oop5.php
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