Bismihi ta'ala
It is a blessing that you have decided to proceed with circumcision, which is an important practice in Islam, and very good physically. Due to your age, the healing process will be bit longer and inconvenient, but the earlier you do it, the better.
Here are two links on information about circumcision:
https://www.islamquest.net/en/archive/fa7039
https://www.islamquest.net/en/archive/fa6757