AA73, in anaswer to your original post - and ignoring the A vs B responses which were invevitable!
I transitioned from B to A, but with no trepidation - I decided and forced myself to approach the course with an open mind. My advice to you is to do the same. As are diffferent to Bs, some bits are better on As, some worse. What you must do is resist the temptation to think "I wish the A has what I'm used to on the B" because this will just make the task harder.
Unfortunately, the A gets a lot of bad press from the B fans, especially in the USA - perhaps because it's not American. And a part of your experience will be how the aircraft is introduced into service. My compay has been flying As for years. About five years ago, we were bought by a larger company which has As, but was traditionally more a B company. We knew the A wasn't poplular there with comments such as the Airbus course being the Boeing appreciation course being common. When they forced their SOPs onto us, we found out why - they were trying to fly their As like 747 Classics. Gradually, we've got rid of their SOPs and are back to (almost) pure A SOPs. If you have any influence on policy in your company, I strongly suggest you advocate using the Airbus SOPs and forget any other manufacturer's procedures.
The A philosophy is different to B's. Accept it and operate the A the way Airbus Industrie intended. You will get far more out of it, and like me, may come to appreciate it. Having done this, I've come to like the A more than the B.