Here's another handy tip: For an adverb, use faster or more quickly - not quicker. Quicker is an adjective, not an adverb. (Faster is both an adverb and an adjective.)
I doubt than many people get angry when you make English errors. Your back-and-forth translation idea might work IF you have someone to help spot your mistakes.
Your written English is already better than most native speakers'. Just keep studying and practicing. It takes more than a few years to become truly fluent in English.