Hello Emrehero,

There is no answer to these questions for everyone, because different people learn in different ways and find different approaches helpful. You can, however, find our general advice for our users in our Help section and on our Frequently Asked Questions page. For example, with regard to the videos we suggest the following:

Many of our pages have a video, some audio or a text article towards the top of the page. They might have a preparation task that you should do first, but often the best way to start is just to press play or read this part of the page. 
If you find what you're listening to or reading much too difficult or easy, use the advice above to find a page in a different section of the site. You shouldn't easily understand everything, but you should be able to understand a lot of what you hear or read.

Best wishes,

Peter

The LearnEnglish Team