Change your root folder to laravel public folder in php settings or do accordingly your host's settings. And check .htaccess file in public folder in not exist copy from https://github.com/laravel/laravel/blob/8.x/public/.htaccess here

Follow the instructions of your Host provider to install Laravel, but it is not advisable because one thing you should know, deploying Laravel application on shared hosting is a complicated, long and tiring process. You will have to go through tons of their documentation to understand how their system works. To make this process easier, I'd recommend using a managed hosting to deploy the application on the server. Like Cloudways, in motion hosting and others.