How long the appointment will take depends on what the doctor does. Some here have had tests in which they fill the bladder to check for leaks. I don't know how long that would take. In my case they just drained the balloon, it fell out, and I went home with orders to call if I had any issues. I didn't. I did leak heavily for months.
I use a manual pump as a rehab tool (it and Trimix help keep plaque from building up in the caverns, avoiding atrophy), and have been using it for a couple of years. Model is "Osbon ErecAid Esteem" from Timm Medical Technologies. This is a prescription version. Since I lost both sets of nerves, and am now on HT,there is no expectation of normal function. Just a matter of keeping it from falling off for now.