I took my advanced test in 2003 after thinking about it for a long time. So glad I did, it makes you "think" about driving in a different light. It also makes you appreciate how generally poor the overall standard of driving is.
I went out with a local observer a few times before my test which was a great help. All I paid for was the test but things might be different now.thing
Go for it, you wont regret it (but your wife might 😁)
Les