It's boring and difficult
The problem with anaesthetics is that there is about 20 minutes of action per day. And that you need to understand the physiology of the entire body in order to do your job. Some medical students (us) barely know the physiology of the toenail, let alone everything else. So, learn physiology! Also, learn the principles of anaesthesia!
The key types of anaesthesia you need to know are
- local anaesthesia - where the patient's consciousness level should be unaffected
- general anaesthesia - where the patient is not conscious (though the extent to which that is true, differs)
Also known as critical care, this area is for people that are severely ill - on the brink of the cliff that separates life and death. They get much higher levels of staffing; at least one-on-one care, often more. It is important to understand the physiology of the body, especially cardiac, respiratory, liver and renal. Your job is to keep people alive, and hope their bodies can do the rest.
Also important is: