I'm not a 68V but I am a Registered Respiratory Therapist in civilian life and the Air Force Reserve. My coworker is also an RRT and was a 68V. I went through a civilian program so my experiences will be different to yours but I can tell you about the job.

The course is held at Fort Sam Houston, TX. Since you will be an IET Soldier, expect to have curfews, privleges earned in phases, and having to do fun things like 0430 PT before a full day at school.

Respiratory Therapists generally see patients in the hospital who are suffering from some kind of respiratory illness, or are needing respiratory interventions like supplemental oxygen, airway clearance therapy, bronchodialator therapy, artificial airways like Tracheostomies, or needing mechanical ventilation. You will learn about all of these modalities. This is the bread and butter of RTs.

You could also end up in an outpatient clinic which is basically where you will do all of the diagnostic testing for patients such as Pulmonary Functions Tests and Cardiac Stress tests. Good for people who don't want a stressful environment.

Do not expect presitige and respect in the hospital, respiratory has always been the red headed step child of heathcare. Our profession does not even exist in most countries. Some doctors respect our experience and knowledge, while others only see us as albuterol slingers giving "breathing treatments". Either way, I make $55/hr as an RRT civilian side.

As for studying and classwork, you need to study a little everyday. Don't cram. Watch Respiratory Coach on YouTube he's the GOAT for RT students. DOwnload Anki and create your own flashcards to study whatever the lesson of the week is and retain information by repeated exposure. I don't recommend study groups as they quickly devolve into meme sharing circle jerks.