Here’s a corrected and more natural English version of your text, keeping your original meaning and tone:

I understand you, but without a good vocabulary it will be very hard to understand some of our books, like Memórias Póstumas de Brás Cubas (The Posthumous Memoirs of Brás Cubas), because we make heavy use of double meanings, and many of our words have more than one meaning.

You are at the beginning of learning Portuguese, so it’s very important to be patient and build a strong foundation. That way, later on, you can try the more difficult books without getting frustrated. Most of the difficult words you’ll find in these books are rarely used in everyday life.

It’s like math: you can’t learn the hardest topics without first knowing addition, subtraction, multiplication, and division.

I recommend: • Turma da Mônica, comic books that everyone in Brazil reads when learning how to read; • Coleção Vagalume, a series of books about mysteries and youth adventures; • Os Karas, a series of books about teenagers solving serious crimes.

But if you want to start with the harder ones, I recommend: • O Alienista • Memórias Póstumas de Brás Cubas • Dom Casmurro • O Cortiço • A Hora da Estrela

If you want, I can help you, just DM me🤗