The basic hearing evaluation should be like second nature. You should be able to grab a thorough case history, otoscopy, tymps with reflexes and AR decay, pure tone air/bone, WRS and SRT all within about 25-30 minutes. This leaves you usually with 10 minutes or so for extra tests (quickSIN, OAE's), and around 15 minutes for counseling or amplification discussion. That is to say for the typical SNHL patient. When you start throwing in pediatric specialty population or crazy middle ear issue cases then this time will take longer because you aren't going to be as fast at masking and other procedures to weed out things such as malingerers.
You should also have a basic knowledge of some of our specialty testing such as ABR's and VNG's/ENG's, maybe not necessarily how to interpret results, but a basic knowledge of how they work and what info they can tell us so you can recommend them when appropriate.
Also you should have a basic knowledge of the different types of hearing aids and their benefits, uses, and drawbacks and the typical cases of when you'd recommend a BTE vs. an open fit or receiver in the ear. The best way to learn more about hearing aids is to pick a couple companies and start reading. Also most of the clinics will have the hearing aid programming software. My computer during grad school had fitting software from Starkey, Widex, Phonak, Resound, and Oticon on it and I was constantly looking at the programming software. That's the way you learn amplification is by doing. You should also be able to check a hearing aid from the factory to make sure it's in working order with a listening check, and also be able to do listening/functioning checks for hearing aid drop off's and how to do basic cleanings of hearing aids.
Now eventually you can get crazy like I am and be able to remove an ITE faceplate, clean the inside circuitry, solder broken wires, and replace receivers if need be. Most audiologists don't know how to do these things, but if you want to learn places will teach you. I just wouldn't do this unless the hearing aid is out of warranty and the patient asks you to try and do what you can.