If by controls you mean the clutch and gear changes, I got comfortable with that in car parks, was doing that before I turned 17. Most of the time you can only really go up to 2nd gear at most but it's a start. Do lots of starting and stopping to get a feel for the biting point. That's really the one fundamental skill you're gonna need, if you're fine with that you won't have any issues.
When it comes to moving onto the road, just don't be afraid is all I can say, but still be careful. Stick with quiet-ish roads below 30 and work your way up. Listen to your parents with regards to how to drive, eg. right of way, which lane to take etc.
Another bit of advice - unless you have the money to get insured on a car and/or buy your own, don't feel the need to take your test quickly. Like I said, I haven't driven an inch on road since I passed my test almost 2 years ago because insurance became too expensive. I could've taken my test a lot later and had more time on the road. If I could go back I would've stayed as a learner for as long as financially possible. But hey, at least my wait will be over in a week.