I'm a 35-year-old current Learner, hopefully from next week on a Driver. I'm taking my test in a manual, but really would prefer to switch to an automatic as soon as possible. If there are any helpful souls on the forum who wouldn't mind giving advice to a total newbie without finding her lack of even the most basic knowledge tedious, I'd be most grateful

So my (first...!) question is about engine size. The difference between a 2.0 and a 2.2 is apparently massive, but as someone whose driving style is soft and calm rather than "treat the vehicle like it's the Millennium Falcon", I'm wondering whether the difference in performance would actually be an issue? Don't get me wrong, I like speed alright, but I prefer building it up smoothly rather than revving the hell out of the machine. So, would you say I and the 2.0 might be perfectly suited? I've read that there's also a huge difference in insurance between the two, is that right? What about consumption? If there is a pretty penny to be saved on insurance and petrol, I'd be quite keen on doing so when I don't actually *need* a beast under the bonnet... however, I don't want to be driving a slug either!
So: how do the two compare?
Any other useful first-time-owner tips would also be most appreciated. Looking forward to getting to know you all!