Roommates are a good idea, but they can be stressful depending on how it all works out. Make sure you're going to have the space that you can each have your own area to decompress if needed. Also, a lot of places will let you co-sign a lease so your roommate is held responsible for their portion of the rent and you for yours. You'll want to make sure your credit score is fairly decent - I know a lot of apartments check now, and even some individual renters will too.
If it's going to be a year, start preparing now. Start cleaning your own area and doing your own laundry (if you aren't already). That includes vacuuming and washing your bedding and bathroom and all that fun stuff. If you're able, start contributing to buying your own groceries, the things you prefer to eat over your father. You can also start by paying for your "portion" of the utilities (which might also help with your father's attitude on wanting you to leave).
Anything you can do to prepare yourself because once you're out, it's all on you.
No sugar-coating, it's going to be tough at first. I learned a TON my first couple years on my own.
Not getting in over your head is GREAT advice. Some great advice I also received was not to get a place that costs more than one week's pay. I know that's REALLY hard to do when you start out, but it's something to consider - maybe getting a place that doesn't cost more than two week's pay, which should be easier with a roommate. That way you always make sure you have residual income for utilities and food.