You can hire a lawyer to take care of your application if you are not sure of what to do and what documents are necessary. It should cost anywhere between 1100 - 1500 dollars. But if you are willing then you can take charge of your own application process and it is not that difficult unless your case is complicated like lots of marriages/divorces, unpaid child support etc. But, if you are marrying for the first time and has no kid then do it on your own.
Apply I-130 for your spouse. It is a basic application and you will need your wife's Birth Certificate and the marriage certificate and of course you GC proof. It usually gets approved within 2-3 months. Being a consular processing, your application then gets forwarded to NVC. It remains there until your Priority Date(PD) gets current. Then when it is about to get current, NVC will contact you for the next steps and where and how to pay various fees.
My personal case: PD of Jan, 2016, PD about to being current and waiting to hear from NVC.
No, you don't need to wait for getting your own Citizenship like someone mentioned above. He probably don't know what PD is. I have seen that in around 2013-2014 when F2A dates were all current but now it has a waiting period of 1.5-2 years.
So go ahead and apply I-130 without further delay, even if you get RFE you will get an earlier PD. Just don't delay. But, if you are on the verge of getting your Citizenship then just wait and apply once you get and at that time you can say FCUK Priority Date ;)
Good Luck