Okay, lets cover some basics.
Clutch: Your engine will perform better if you use the clutch, disengage it, whenever your speed is less than about 10MPH. When starting from a dead stop use your pedals and get above 10MPH before engaging the clutch. Same when coming to a stop. Squeeze the clutch lever when your speed drops below 10.
Keep a close watch on things like fasteners and brackets, especially in the first few hours of operation. Things will loosen due to vibration and heat/cool. Engine fasteners, particularly cylinder head bolts, intake and exhaust and carburetor to intake manifold are all places that normally will need some attention periodically.
Tire inflation, bearing lubrication, chain maintenance are also areas of concern but being a pedal bike rider these things you'll already be aware of.
If your bike has fenders, 'Beware'. They can hurt you. There are several good threads here addressing fender hazards and how to reinforce factory fender braces and attachments.
These are just a few and I'm sure other members will have more suggestions for you. Be patient.
Tom