Wanting to purchase a Subaru, please give me advice!

I (24f) really want to purchase a Subaru because I know they have AWD and are reliable. I currently own a 2013 ford Edge and it has 168,000 miles on it and is on its last legs (I’ve spent $2k in repairs this month)

I have a strict budget of $15k and am wondering if purchasing a Subaru with 120,000 miles or so is stupid. Should I aim for under 80,000? My family is saying you HAVE to get a car that is less than 3 years old, and has less than 30,000 miles. I tried explaining to them that a car with those stipulations would likely be double my budget.

They think it’s absolutely dumb to buy a car with 100,000+ miles, but from the research I’ve been doing, it sounds like Subarus can handle the mileage whereas my Ford (my entire family drives ford cars) cannot. I’d love advice on purchasing!

Also if you recommend buying from a big dealership, or a used car lot… I really know minimal about cars and don’t want to get swindled! Thank you!!!

EDIT: my max budget is $15k because I make $40k a year, and my rent is $1300 a month. I don’t have $15,000 in the bank for a down payment, I have like $2k plus my trade in. Not a $15,000 down payment.