Most of us are used to starting with grammar, treating grammar as the significance, and focusing only on grammar but totally forgetting to practice speaking.

You always think that learning English means having to do a lot of grammar exercises and having to memorize new vocabulary. However, you forget that the ultimate goal of learning a foreign language is to communicate.
And the only secret for you is to speak, to speak every day, as often as you can.

Know the vocabulary but don't know how to apply it. When learning new words, there will be words that you already understand and remember the meanings in your head, but it is difficult for you to recall when applying them in actual communication, that is, 'passive' vocabulary. In contrast, 'active' vocabulary is words that you can 'actively' recall and utilize when communicating.

One of the reasons we learn and do not feel the excitement of a new language is that we actively consume the new language, actively reflect, and automatically think as we think in our native language.