I worked at the IRS for 5 years. After I left, I needed to earn some extra money so I attended Block's classes and then worked for them for three seasons. Back then, you had to take the class regardless of background.
The class was well taught and covered all the basic issues of personal returns. Frankly, I think more people should take the class just so they will understand the system better. The software that you will use in the office is easy to follow and helps you assist the client through common issues. If someone arrives with a complicated return, Block will not let a "first year" work on it. (That rule did not apply to me and I got some really weird things thrown at me some times. There is no way Block training could have thought of some of things that people were trying to deduct!)
The people were nice, the hours were long and I was often embarrassed to look someone in the eye and say "that will 500.00, please"
The pay is low. About $8.50 something an hour, and you work towards a bonus based on the total of the charges that you generate
ie the higher the fee, the larger your bonus. Bonus is paid in May.
In addition to having a Ptin and taking the CPE classes, tax return preparers can work toward the requirement to take an enrolled agent exam. This is a big deal, similiar to an accountant taking the CPA exam. Enrolled agents can represent taxpayers the IRS and even in tax court.
If you only want to try it once, it might be a good way to earn some money towards your disney trip. If you become good at, built a client base and upsell you could finance a trip every year off the money earned. You will get out of it what you put into it.