Also you might want to look up when to use 'shall'. I think the verb you want here is SHOULD.

These phrasal verbs have similar but NOT THE SAME meanings. Speak up has three meanings: 1 : to speak loudly and clearly “Speak up. I can't hear you.” 2 : to speak at a meeting, in a class, etc. Seeing that no one was going to answer the teacher's question, he decided to speak up. 3 : to speak freely and confidently about something : to express an opinion openly Several of us decided to speak up ABOUT our working conditions. — often + for She is always ready to speak up FOR animal rights. NOTE: Meaning #3 for speak up is closest to the meaning of speak out but the collocations (prepositions used) differ. Meaning of speak out: to speak freely and confidently about something : to express an opinion in an open way She is never afraid to speak out ON controversial issues. — often + against Protesters spoke out AGAINST the decision.

https://www.antimoon.com/forum/t6922.htm Have a look there.