I've been driving for 17 years now but I may have picked up some bad habits along the way! haha so it's best I learn what the different highway signs mean and what the laws are instead of driving around with a US license for 1 year just because I can.
You will certainly have picked up habits that are totally different from what is required in the UK.
The driving differences here are much more in-depth than just driving on the other side of the road. You'll want good instruction to get you past the changes. I drove for a while without instruction before my test and was okay, but I took time to understand most of the signs and road basics first. (I still felt like a nervous 15 year-old learning all over again for a while though.)
As for learning the signs and laws, I recommend buying a computer program that will take you through what you need to know for the theory test. Mine had the theory test questions in a good learning format with practice tests and study sessions, the Highway Code, a roadsign database, hazard perception tests, etc. I got my program for cheap on Amazon and it made my test much easier as well as learning the funny little laws that DH really didn't know to explain.
How soon after moving to the UK did most of you take your practical and theory test?
I took mine just past the year-mark because of a string of personal circumstances. How long it takes depends on where you live and what time of year you apply. I'll give you the same advice I was given. Start as soon as you can, because it takes longer than you think and you don't want to get stuck. Each individual step took a while.
Was it difficult or simple?
theory--pretty simple after lots of studying, but I still stressed. Practical, I'll be honest, was stinking hard. I couldn't have done it without my instructor and I have nearly 20 years driving experience.
Did you pass the first time?
I did, many don't. I was so very relieved! My sister-in-law took the test 8 times. Of course, her stressing out and yelling at the instructor to shut up may have had something to do with at least one of her fails.
Did you hire a driving instructor first or did your hubby/wife teach you?
It's a personal choice, you don't have to have an instructor, but personally I think you would be foolish not to get one. They can take you through lots of specifics that make things much more clear-cut and easily repeatable--even under great stress like the test is. Ask around. I quizzed people at my office and was glad. There are a ton of instructors out there, but was able to find one with a really high pass-rate that was honest with me and my money because I got the opinion of multiple people first.
Oh! and do I need to have my own car for the practical or do they have one for you?
you can do your own car, but if you do, you will have to take extra measures like getting an extra rear-view mirror for the examiner and making sure you have L-plates. Most people take the test in their instructor's car, which is ever so much simpler. It's really more of the norm.