Grandparent I’m not close to, offered to let me live with them. How do I ask the terms and conditions without seeming douchey?

I’m 17F, about to be a 18. I grew up with abusive parents, and those parents cut off their family. Past age 8 or so, I never spoke to my extended family. I started reconnecting with them at 16/17, and they’re all very kind and warm. Since meeting them at 16, I wanted to move to the city they live in, so I can be close to my family. I didn’t have a family growing up, I want one now.

I know they’re busy, adults are busy. I’ll be busy in 4 or so years when I’m a “proper” adult. But still, living near them will probably allow for more of a relationship than living states away.

While visiting, my grandparent offered to let me live in one of their properties, if I wanted to go to college there. I kind of got conflicting information about the terms and conditions of it all. I’m not even entirely sure if I’ll be paying rent or not. (Grandparent said I wouldn’t have to, but previously said it’d be cheap rent. So I’m not really sure…)

I want to know what would be expected of me. Like, you know what you’re getting into when you sign an apartment lease. You know if pets are allowed or not, you know what will get you kicked out, etc etc.

I know they’re family, but they’re also family I’ve met 3 times past being an 8-year-old. I’m not going to smoke in their house, or trash the thing with parties or anything. But I’m also not even 18 yet and I’ve never lived “”alone””. Im inexperienced as hell and might fuck up simply because I’m stupid and inexperienced.

But because I’ve met them three times. I feel really douchè and like a user if I jump on this opportunity straight away. Because like, wow, the granddaughter you barely know is already asking you for things. But also, I kind of need to know if I can even afford to live there, since I need to know if it’s worth applying to colleges there or not. And that deadlines in a couple months.

Advice?