Got married during ESTA and overstayed, need help.

[Riot]

I met a girl from Greece in a weird way on Facebook. We started skyping for hours and hours and after about 6 months I finally bought her a ticket here. She did the ESTA program because I wanted her to come as soon as she could and she was set to stay 6 weeks and then go back and finish college. We insantly hit it off and after a month I asked her to marry me. We got married and We spoke with an immigration officer who told us to file for change of status, I485 and I30 I believe? The only problem is they were a combined 1,500 dollars and we didn't have that much to spend. Her ESTA expired in 11/2015, now it is 1/2016 and I have more than enough.
I am looking at the paper work and I am not sure what to select on some questions, for instance, she doesn't have a Visa when it asks for her visa number.
I CAN afford to hire an attorney but I would rather not if we don't need one, I see they can range from $600-1,500 but I will if I need too.
This is a real marriage, it will be very easy to see and easy for us to show.
Any idea how I should do this?
Do I just fill out the forms and leave the visa blank and then put the forms and checks in an envelope and mail them to the addresses? It can't be filed online?

 

[newacct]

For the nonimmigrant visa number question, just put "none" because she didn't use a visa to come to the US, or you can be more verbose and say something like "none - Visa Waiver Program". If you have questions about any specific item on any forms feel free to ask on sites like this one or on VisaJourney, etc.

Each forms requires many supporting forms and materials. Make sure to read the instructions to see what you need.

 

[EURO2014]

I met a girl from Greece in a weird way on Facebook. We started skyping for hours and hours and after about 6 months I finally bought her a ticket here. She did the ESTA program because I wanted her to come as soon as she could and she was set to stay 6 weeks and then go back and finish college. We insantly hit it off and after a month I asked her to marry me. We got married and We spoke with an immigration officer who told us to file for change of status, I485 and I30 I believe? The only problem is they were a combined 1,500 dollars and we didn't have that much to spend. Her ESTA expired in 11/2015, now it is 1/2016 and I have more than enough.
I am looking at the paper work and I am not sure what to select on some questions, for instance, she doesn't have a Visa when it asks for her visa number.
I CAN afford to hire an attorney but I would rather not if we don't need one, I see they can range from $600-1,500 but I will if I need too.
This is a real marriage, it will be very easy to see and easy for us to show.
Any idea how I should do this?
Do I just fill out the forms and leave the visa blank and then put the forms and checks in an envelope and mail them to the addresses? It can't be filed online?

Just a thought: you possibly may want to look into I-864 requirements early on in the process?