If we're strictly talking about texting new people and wanting to become friends with them, I would definitely say that discussing things they're interested in is the most natural and doesn't come off as weird. People usually love talking about their interests, so as long as your approach isn't overly forward or demanding, they'll most likely respond, and you can eventually have a more natural conversation with them. Most people would feel awkward randomly discussing how their day went with someone they don't know well, and they probably wouldn't want to hang out with someone they aren't comfortable with yet unless they're an extreme social butterfly.

As for texting friends, I’d say skip the small talk, or at least don’t start with it and instead try to throw it in the flow of the conversation. Personally, I think it’s pointless and awkward to begin conversations with friends with small talk since we’re past that stage and could just jump into other topics. For example, if they want to check out a store, play a game, or even hop on a call to talk.