Nobody

I really want to learn how to edit 

How do people make "vine" edits of wattpad trailer or what ever? 
          I'm want to learn so I can make some but it's hard I don't know what app to use, how to download clips, how to find clips and all that stuff :( 

I haven't been in the mood to read what is wrong with me? 

Why is writing so hard for me? I can plan a whole story in my head but once I start to type none of it makes sense