How to date an American lady from Middle East

I met a lady who is working in convineience store. After few days, I realized that she is cool, respectful,beautiful and friendly. So, I decided to go there more often, once a day after my work, to let her know me. I acted like a regular customer. After couple of weeks, she asked me:" Hey, do you work in this plaza? I am always wondering since I am seeing around." I said I work nearby not in this plaza, and she asked me where I work. After few days, I decided to ask her to know her more. Since I first thought she is Mexican, I asked her is she is. She told me she is from Middle east, Palestine, and she came to USA with her mom when she was kid. She asked me, "What about you?" I told her I am from Africa. She told me as she have a friend(girl) from my country.The next day , I wanted to know more about her , her religion. I asked her if she speaks Arabic. She told me as she speaks it fluently. Then, I used one Arabic word, Asalam alaliku . She told me she doesnot used often because she is Christian. We talked a little about religion in Palestine, and she asked me," You are christian, right?". I said yes. After a week, I decided to get her facebook to know her more including her relationship status. Unepectedly, I found her in the store with kid. I asked her, if the kid is hers. She said the kid is actually her cousin, and she is not enough to have child. I apologized, and asked how old she is. She told me 22. To know whether she is interested in me ; and to let her know my interest in her, I bought a lottery ticket and told her If I am lucky enough in winning the lottery, I will share with you. She said, "That is really kind of you.". I , then, asked her if she is on facebook. She replied," I dont often use it. But, if you want my name is....". And, She also asked me my name. Unfortunately, I couldnot find her on facebook partly because there are many facebook names with her first name. 1. Is she interested in me? If yes, how do I know? 2. I am single middle age man 30 years; she is only 22. Does that matter in USA?3. What shall I do next? NB. 1. My apology as I am not such perfect in writing English since I came to USA one year and one month ago. 2. Since I never dated a lady from other country, I am really excited to date an American lady. Any comment and/or suggestion is appreciated!