I can SHOW you that once you have MADE a foundation, your knowledge will grow.
You will SEE that when you CREATE simple sentences, or you have MADE simple sentences, your ability will improve quickly.
I can SHOW you that trying to MAKE or CREATE a great many different sentences with a massively extended vocabulary of words that are unfamiliar and uncommon is ineffective as a study method.
You can SEE from your own practices that this works. You can SEE for yourself that this is effective.
Also, every single word that I have used in these answers, should become a part of your working vocabulary. You should be able to use each word in another sentence that you MAKE or CREATE for yourself.
The way that will SHOW this to be an effective method, is your ability to MAKE sentences and SHOW them to a language partner. For the moment, the language partner that you SEE, is me. So you can write back and MAKE your own sentences and SHOW that you SEE how this simple method works.
I have not SHOWN you any word that is not important to MAKE or CREATE your own sentences. If you can SEE these words, you can MAKE many sentences with these words.
Other people will SEE what you MAKE. SHOW that you SEE the method.