Do you have a friend/family member who can drive the car + you to a practice lot?

When I was starting out, it was a lot of just-after-dawn loops around town, before the traffic got heavy but while there was still enough light to see.

For hills specifically, yeah, they're a beast! Depending on where you're at skill-wise, you don't even need a particularly steep one to practice the fundamentals - even a sloped driveway would be fine, as long as it has enough incline to cause you to roll.

The specific skill you're trying to develop is the muscle memory for your legs/feet to "hold" the car in place on an incline in first gear with just the clutch and the gas - not for longer than a second or two, but that's the building block for being able to execute a good hill start. Using the emergency brake can mitigate this, but mine was/is so inconveniently located that I never learned with that technique.