Greetings,
I am in the process of getting my first mortgage and have found some homes within the price range that I can afford in OKC. The lease on the apartment I have is ending in about 4 months and I do not have enough saved to cover the closing and down payment costs of a mortgage. It sounds like the REI assistance might be what I'd need to be able to get over the closing costs hurdle and I'd like to know what the next step is.

Is there an application I need to fill out to see if I qualify for the assistance? 

I have talked about getting a mortgage with 3 credit unions but only one of them seems to have FHA mortgages and I haven't done any applications yet since I know that it can affect my credit rating and didn't want to commit to the application fees before I knew how I was going to cover the closing costs. I also didn't want to complicate things if I did qualify for REI assistance just in case there was a specific set of steps I needed to go through before making the mortgage application. 

Thank you, 
Joshua.