Adjustment of Status - I-485

Hi this is Hussain. I have a interview for I-485 6/19/2019 . I am currently holding OPT I mean EAD card. we got married November 21 ,2016. now I want really want know is it require to take lawyer with in our interview??? some said yes some said no . we are confused. on the we have real marriage. we have been living together since we got married. however, unfortunately we do not have joint bank accounts, because we did need it thats why we did not open it. and we do not have any lease or bills because we live with my sister. we have medical insurance and all pic for weeding . also we have some bus tickets that we visited somewhere. now my questions is that enough to show Uscis. But we have confidence enough because we have been together since we married and we know each other very well.. if u have any suggestions please I will be appreciate.