For the purpose of removal of conditions itself, it doesn't really matter who files for divorce. And in your case, because of the timing of the divorce decree, I would go the uncontested route and not choose VAWA. File for divorce, get the decree, proceed to ROC.
Get as much evidence of a bonafide relationship as you can. This includes (but not limited to)
Joint bank account statements
Joint utility bills
Joint deeds/ leases
Joint Federal/ State taxes.
Notarized and sworn affidavits from friends and family members.
VJ is a DIY site, so plenty of people that are still married have done it, including myself, without an attorney. Divorced people do it without an attorney too, but you do need to know what you are doing and what to file.