Enter an online essay contest like the ones organized by:
http://fqxi.org/community/essay/
The entrants will give you feedback on your ideas and english skills.
And you can respond to the to the other entries in the contest usually about 200. What keeps it interesting is that you could win a prize and make some friends!
Right now FQXi.org is between contests. They usually have one a year.
Dominika Topa-Bryniarska makes a good suggestion. Digital storytelling has been shown to be an effective method for the teaching of writing skills - there are many tools available though - Storybird is just one - you can find a comprehensive list in: Batsila, M. (2016). “ Once upon a Time there was …” A Digital World for Junior High School Learners. International Journal of Emerging Technologies in Learning (IJET), 11(03), 42–50.