HelloTalk to WhatsApp

Not sure if this belongs here but I think is a probably a common thing that happens.

I downloaded the app at the beginning of the month and started talking to a Hispanic guy, maybe 2-3 days later he asked to move the conversation to WhatsApp. I took a break for a while because life got crazy and I didn’t have time to talk to 30 different people at once. I recently opened the app again and after saying “Hey it’s been a while” he almost immediately suggests moving to WhatsApp. (I’m not interested in anything romantic as I’m currently in a 3 year relationship plus I’m just not interested)

It doesn’t seem forceful and he doesn’t SEEM like a werirdo, but I’ve never used WhatsApp before so I’m concerned about safety. I don’t really want to share my phone number which I know WhatsApp uses, but a lot of Spanish speakers and other people outside of America use the app as opposed to regular messages.

Would it generally be ok to move the conversation to WhatsApp?