1. improve your pronunciation

2. to learn all the grammar rules

3. learn the rules of reading

Объяснить почему именно эти 3 пункта нужны для изучения английского (написать на англ. яз)

It’s important to improve your pronunciation for people could understand you. You should work over your pronunciation every day.

It’s also important to learn all the grammar rules because your speech must be grammatically correct when you are speaking.

And, of course, you must learn the rules of reading because without knowing them you cannot read in English.