Does it really work?

I have never believed in long distance relationships. But now....I have a long distance "boyfriend". We met each other 11 years ago at university and hung out sometimes. He was my best friend's bestfriend. He didn't see me as anything before, thought I was immature I guess. I had a crush on him back then. We stopped having contact for a while. I left the country. After a while, he left the country too. He lives in Mexico. I live in the US. We got in contact again like 4 years ago and talked sporadically. Then he started calling me on the phone. We talked more and more frequent. He told me many times I was cute and I didn't really believed him until my best friend intervened. She told me he was being serious and I was like what? He asked me if I wanted to be his girlfriend and I said yes. It's notable to mentioned past my late twenties and I've never had a relationship before. So I really don't understand how to do anything. He asks me for sexy pics and I kind of don't feel comfortable with my body. So I never send anything like that, instead, just general selfies of me. We never video call either. Is this strange? I'm kind of scared 9f a video call. Maybe can I have some advice? I feel like a teenager lol and I'm way passed that age.