Sounds like you will be wanting a smaller car. Those don't lurch as much and get better gas milage. That's what I drive. Eventually, it comes quite naturally.
It comes with the territory for one to be nervous and make lots of mistakes on the first outing, but eventually you get that satisfying feel of greater self reliance. Makes all the heart attacks worthwhile.
My suggestion. Hold on to that offer until you are absolutly sue you cannot make it. This is a golden opportunity. You don't get many of those.