1, Self-study: Self-study is too difficult. Without the guidance of teachers, it is difficult to learn a language well. Self-study will also lead to unbalanced development of listening, speaking, reading and writing.

2. Regarding whether Portuguese is easy to learn, I think Portuguese should be easy to learn.

As for the prospect of the two languages, I think each has its own advantages. Although there are many Spanish-speaking countries, they are all small countries and can't become a climate. All these countries together are not as big as Brazil. Several Portuguese-speaking countries are developing rapidly, and their contacts with China are getting closer and more frequent. Moreover, few people learn Portuguese now, and the employment situation is very good. However, there are too many people learning Spanish, and it's a little late now.

4. In today's society, "science and technology+minority languages" has great employment advantages and competitiveness.

5. Suggestion: Learn both languages, Portuguese first, then Spanish.