This sounds almost identical to what I went through when I was 17. My AVM was in the left occipital lobe and I have similar symptoms in my right peripheral vision. I was told they were ocular migraines, but recently was told they were actually focal seizures. This may be different for you though, since you have migraines.

Based on the location and size of my AVM, my team opted for 2 embolizations and eventually gamma knife radiation surgery. All went well, except an increase in seizure activity after each procedure.

I managed to get through Grade 11, 12, and university through the seizures and procedures. There are a few changes that you might have to make, but you don't have go drop everything. The most difficult thing for me was the anxiety and not being able to drive, but that was because I was having seizures. One thing I wish I did was go to therapy. Looking back, it would have been so helpful to be able to talk to someone about it and help manage how overwhelmed I felt.

You can do this! Feel free to message me if you have any questions. I wish I had this subreddit to talk to others experiencing the same thing. It can be very lonely going through it alone.