From my own experience, don't worry too much. I had a fairly big perforation 25 years ago. No pain and no significant loss in hearing. I've still got the condition all this time and have been flying commercially. There's been the odd comment if the examiner hasn't seen me before, but the bottom line is you can fly with this condition. Look after the ear and keep it dry. You must not swim unless the condition heals or you have an operation to fix it (not me, thanks).