Create website which has usefull information like videos, third party API for live information on education

I want to create a website which consists of videos which will be uploaded by the admin and many useful information which all will be uploaded by an admin. I have got the domain name, remote LAMP server.

I have gone through many tutorials and I tired creating using Drupal 8. Website was fine but while creating a new existing module the whole thing got crashed and I don't want to goback and recover it since it is a big mess.

So I want to try from first keeping it very simple.

Kindly guide me to achieve this. I will put all my effort to learn it. Any help any documents which will help me to create will be greatly accepted.

I am beginner in C++, html. Can you guys let me know how can I achieve in creating a website.