I (26M) hooked up with a girl from Tinder (18F) and feel weird about it, need some advice

So as title says, I met this girl on Tinder and she's 18. She's basically an international student who's just arrived to the country like 3 weeks back and was looking to meet guys, she later tells me that she's trying to lose her vcard. I'd already said yes to meeting her so I met and we took a small edible since she wanted to try it, made out and basically received oral from her. Still didn't sleep with her though.

I had never met up with anyone with that much of an age gap but I was curious but I came home and immediately regretted it.

But, she stays alone and told me when we met that she's very depressed moving to a new place, lack of new friends, loneliness, strict parents etc so I'm sure she's just doing this to find some company and dealing with trauma. She just told me on the phone that she was extremely depressed when she first came here. I do care about her wellbeing, and wanted her to have some help.

Even though she wants me to be 'casual', I don't want her to get attached to me but instead find the help she needs and similar age group friends.

She's asking to meet again in a few days to go on a walk, should I:

• Go on the walk but tell her that I won't be getting intimate, that she can still talk to me but that she should probably meet people her age?
• Just tell her on the phone and not meet her again at all?

Either way, I'm trying to get her to use a free mental health organisation in my city so that she has someone to talk to.

I just need someone to calm me down, I feel like a creep, I want to do the right thing.