Healthy weight gain tips ?

I’m slim but I want bigger thighs and bum. I work out and eat a healthy diet cus I like being toned. I have skinny genes so it’s kinda hard. Im a runner also and do weights but only do like 2 machines for my thighs. They’ve gotten a little bigger but I don’t know what to do to get a bigger butt. I can’t afford a gym either 🤦🏻‍♀️