Start your writing with the words that you truely know.
If you want to write something about climate change , you start your writing with the words that you truely know. Then there comes the problem that you dont know the words used often with climate change or that you are unable to put your thoughts about climate change into words ,What is your way to deal with that?
A dictionary and some sentence patterns you have worked very hard to remember in your mind could be a help.
But as a matter of writing,you actually dont know what to do with those memorized sentence pattens.
Everything about writing would end up being given up with a self-comforting sigh that After all I tried.
It is no use to just remember those words and sentence patterns because you have no idea of the usage of those and you yourslef never use those.
If you are not good with English writing then you have to accept it as a truth rather than coving it up with some big words or skills you learned from somewhere that doest work at all.