How to Fix a Flat (Bicycle Tube)
An pretty simple process, you could probably teach yourself online, but i can walk you through it.
Tools Needed - Bike Pump, Tire Levers, Patch Kit, and possibly an extra tube if the hole isn't patchable.
I will show you how to Fix a Flat, change your tube, inspect the tire and rim for possible thorns and other sharp objects, and reinstall it to your bicycle. If the hole is too big or too close to the stem, this may not be possible.
Training & Qualifications
I've patched many a tube in my life bicycling.