I went through this many years ago but the rules now seem to be pretty much the same as they were then. This isn't difficult. Here are a couple of links that may help if you haven't seen them. You don't need an immigration attorney. You are legally entitled to bring your wife into the U.S. and there is a mechanism to do that. All of the processing for a green card/citizenship is done after she is in the U.S. That is the time consuming part.
Links that may be helpful"
https://travel.state.gov/content/vis...-relative.html
https://travel.state.gov/content/vis...ly/fiance.html
BTW, this is probably the wrong place to ask for this kind of information. There are plenty of ex-pat and immigration forums that would be significantly more beneficial to you than pprune