attend a speech

[Ashiuhto]

Please check out the following sentences.

(1) Since I entered senior high school, I have attended several speeches given by prominent persons.
(2) They are from various walks of life, like professors, doctors, scholars, journalists, literary authors, and so on.

[grammarly]

Please check out the following sentences.

(1) Since I entered senior high school, I have attended several speeches given by prominent people.
(2) They are from various walks of life, including teaching, medicine, academia, journalism, and literary writing.

A - We use the term persons is most frequently used in formal and legal settings. It is unlikely that it is appropriate for what you are writing.

B - If you are listing some examples from a larger list of something, you can introduce this partial list with the word 'including'. This signals to the reader that you are not listing everything , but only enough soe that we get the idea.

c - Also, walks of life is synonomous with 'fields of experience'. In this case you should list the area of their experience, not their actual professions.

[Raymott]

Please check out the following sentences.

(1) Since I entered senior high school, I have attended several speeches given by prominent persons people.
(2) They are from various walks of life, like such as professors, doctors, scholars, journalists, and literary authors. , and so on.
They are from various walks of life: professors, doctors, scholars, journalists, and so on.

I'd try to avoid using 'like' in this situation, especially in formal writing. But if you do, you don't need 'and so on' as well.
R.