No problem! I'm more than happy to help!

Depends on what regular activity you're talking about but for the most part a SD can do everything other dogs do when they aren't working. (Play ball, go to the dog park, go on walks, learn tricks, ect) Also just thought I'd add, there's no such thing as a "Certified PSD" the places that sell tags and "Certify" dogs are just scams to try and make money off people.

Classes? Do you mean like training classes with the dog? Organizations do all the training before you get the dog, you only have to follow up (And they will show you how) you don't have to go to any training classes unless you want to for fun. With most organizations you aren't very involved in the raising and training of the dog. Here's how it goes with most organizations:

A puppy that they breed is sent off to a "Puppy Raiser" someone who teaches the dog the basics (Sit, down, stay, leave it, their name, come, stand, ect) and gets them used to new things, places, noises, sounds, people, animals, ect. After they are done here they go off to more special training where the dog learns the tasks and work they will be doing along with more advanced stuff. This all takes about six months to two years from the time you fill out the application, get accepted, they pick out a dog for you, and specially train it.

After all this you go to something called "Team Training" for about a week. Here you learn all the dog's commands, how to handle the dog, how to work in public, how to contact the trainer for any issues, ect. Then you take the dog home.

Type in the name of your state and the word "Psychiatric Service Dog" (Example: Florida Psychiatric Service Dog) into Google and it should come up with a bunch of training organizations. When you find one you like and want to apply for, Google the name to make sure there are no bad reviews.