18.5 months for Raleigh. I know some places have higher estimated times.
I just actually started working last July. There are times when I was really, really so frustrated that I just can't help but cry. It was struggle for me because I am not used with not working and having the freedom to go wherever I want and having my own money to buy things that I like. In my case, I can't even drive so I felt like I was stuck in our home whenever my husband is at work. And we don't have a proper public transportation where I live. You might've read/heard this before but find a hobby that you like or watch some things to past by times. Avoid social media if you can (because in my case, there were a lot of times that I felt sad that my case is not progressing whenever I read someone got their combo card or GC in less than 6 months).
Or if you want, you can ask your senator/state rep for help regarding your case. (I've seen a friend that did this, she filed this year, got her combo card and GC within 4 months). I just don't know what are the reasons they stated. I never tried this route because I don't really have any reason to expedite/ask for help.