My Pronunciation

My pronunciation challenges are long and short /e/ sound and some consonants such as /w/, /r/. 

I think it is difficult for me to pronounce especially /r/ is in the middle of word. 

And I am not sure which 'e' sound is long or short so that it makes me hard to pronounce it. 

And it's also not easy for me to pronounce when there are 3 more consonants in a row in a word. 

I must practice those sounds as much as possible. :)