I agree with everything others have said. Knowledge is a great thing and there are lots of books out there, professional papers, and special trainings even after you get your masters. Many bigger cities have a trauma center where they might allow you to do an internship or training and that would be a great opportunity to get some hands on knowledge.
I had my masters in Counseling Psychology for several years before a single incident on top of some daily situation brought about my ptsd. I can only tell you that when you attend such a program, you learn a lot of stuff and are able to diagnose and treat, there many overlapping symptoms and things, that you already know before making a conclusion. When I was in grad school, I actually believed that I had experienced depression in my past and had been treated with anti depressants and therapy. Well, I guess I had not really experienced depression. Because the depression was diagnosed long before ptsd, and the depression was so disabling that I could not function. I probably had experienced some minor depression, associated with grief. I am only validating what others have said, it is so life altering, so unique to each, that it is almost impossible to describe.
One small bit of advice, never be afraid to ask. Ask when you see subtle changes, what is going on, what are you feeling right now, what is happening, I thought I noticed a change when xyz, can you tell me about it, etc. Like others said, ask specifics here, listen and read all you can, and if the opportunity is there and you have some interest, get training that is not required. I spent over 100 hours in intensive day long trauma trainings that included those with ptsd and DID among other things, and still was not prepared for the experience. I survived so many life adversities and was strong, or thought so anyway. Take care of yourself. I think burn out rate is high. It cant be easy work. I was a trainee, so the beginning was mostly observation, moving on to some therapy work, art therapy and so forth. As I look back, I can see it through the clients eyes in a way that I did not, or could not at that time.
I dont practice at the time. I dont diagnose. I have been on a break from work for several years and do not know that I will ever be able to return. I am resistant to that thought, but am a realist.
Think of hanging a ball and chain around your neck that is your own weight, then go about your daily obligations. Its only my opinion, but I would have rather lost my limbs. A stranger might even open a door for someone with a visual disability. At times, some irrate driver giving me the finger can send me back home without the intended plan for the day. Of course I self talk, stay positive and talk through many things, but at times all the resources and skills still fail me. Any threat can become critical, and you can tell yourself that you are irrational and that might work. You can talk on forum and analyze, I was doing so well, why this incident, and never come up with an answer. For me, it can drive me crazy and that might be because I am very analytic, or was at one time.
I wish you the best and am sure you will find answers. There is nowhere to go but forward, just like the rest of us.