2. Choose a learning method. The conditions are very rich now. Take English classes, study online, find friends to learn from each other ... It's not bad to do a free English proficiency test here if you have time. Find a suitable learning method anyway.
It is also important to remember words. Forgetting words is normal. No one wrote down what they would never forget. It is important to repeat them. The so-called fast memorization of words is because you remember more words, and the accumulation of many words makes analogy memory possible. There are more words you remember, so it's easy to find a method that suits you.
4. Practice more written English textbooks, read one every day and understand it carefully.
5. Wish you success!