I need advice.

So.... I went to vietnam recently. And it's a wonderful, beautiful place. I loved it. I miss it.

While on a city tour, we had a guide. And he was.... so cute! So patient and calm, and fun, and a little nerdy. I got a picture with him and also got his Instagram (cus this girl is NOT not networking with cute people). Now, we had a cute little conversation. There was no flirting but there was a vibe. 

The only problem is, our mans 24. I am 18. We're not even in the same decade. Is that problematic? Should I text him more? I wanna ask him a few things... like his birthday, about what he studied in university and just... stuff. 

Should I text or should I not? Is the age gap... bad? My friends say so. But it's not like I am pursuing a relationship. I just wanna talk. 

Also, would he consider it annoying if I text him? Let me know please.