I need help concerning a linguistics research?

Question

hello ppl, plz I need your help: I'm on my graduation research in linguistics and the whole issue revolves about: critical discourse analysis, systemic functional grammar and the appraisal theory concerning the attitude of writer/speaker. plzz i need elaborate answers, don't tell me "ask your teacher". and if u know a good online group or study website plzz attach link. thx alot