it always peeved me that they charge 10+$ for passport photos - the passport website has a tool to help you size your photos, and you can fit six 2x2 photos on a 0.25$ print - use the other 5 for when you apply for your stamps!
The same place that does finger prints and photos can use your same photos for passports.
Excited that you'll be traveling abroad for the first time ever. Can't wait to hear all about it.