I would like to speak about this month’s Gosho passage, which is a section of the Gosho entitled "Reply to Myoichi ama " ( "Myoichiama gozen-goshosoku" ).
Should it be ‘talk about’ instead?
Should the bold part be enclosed by quotation marks, just as “Reply to Myoichi ama” is?
The use of ‘speak about’ suggests that you are actually going to say the words, that you are going to make a live speech. In writing something you would use ‘talk about’ because that indicates that you are going to discuss something on paper.