I had my first biopsy (tongue) done by an oral surgeon in the office. He numbed the area, removed a small sample, and then stitched it up. It wasn't pleasant, but not as bad as I expected. The next day I got on a plane to attend a business meeting. I was able to eat and talk, but it was a little uncomfortable for a few days. It took a few days (maybe a week) to get the results, and most doctors will schedule you for a follow-up appointment to go over the results and to check to make sure you are healing OK from the biopsy.
Some ENTs may refer you to an oral surgeon for the biopsy, but the ENT that treated me did a few biopsies right in the office. If the ENT decides to do a biopsy, they may have you come back for another appointment. This is something you can ask when you call to make an appointment.
Yes, OC does not discriminate because of age, and we have a number of forum members that are your age. But again you are relatively young and there are a number of things it could be besides oral cancer. It is best to have it checked out.