I totally understand being nervous. I was nervous too. I got my implant in 2014. It is on my left side. I have a little bit of hearing in my right ear, but I do not use a hearing aid because it really doesn't help. Most of my life I just used a hearing aid in my left. When the hearing in my left ear dropped to the point where my hearing aid did not help, I decided I would get the implant. I was told all the complications that you were told and I too was told they are very rare. I did not have any of the complications that you mentioned. In fact, I did not really have any pain. I only took 1 of the pain medications (mostly because I thought I might get pain), but when I didn't, I didn't take any more.
I also understand your concern about the doctor. My ENT, who was planning on retiring, was going to introduce me to the surgeon who was also going to become my new ENT, but before that could happen my first ENT had a stroke and did not come back to work. I knew about the surgeon and had heard very good things about him, but didn't know him like I did my first ENT. Fortunately everything went well for me, but if you do not feel comfortable, are there other surgeons you can meet with?
I think all the things you are thinking about and worrying about are the same things other people, including me, experienced. I can only tell you that my life has never been better.
If you have any questions for me please feel free to ask.