Welcome to the group!
No one can tell you just what to expect, Graves’ seems to affect all of us somewhat diiferently.
I recommend you start off by checking the NGDF home page (at the top of this page is a link) and the different links available there to get more info on the disease.
Take the time to go back thru as many of these postings as you can, they are pretty informative. Do remember that a lot of us here are worst-case Gravers. 90% of people with Graves’ have no major problems with the treatment.
Good luck! Bruce