Hey Cal,
So you had your first smoke and it was a success, congratulations.
As to where to post, you click on "FORUM" at the top of the page and choose what ever category you are wanting to post about, for example your pork could go in "SMOKING MEAT" a question about your smoker would go in "SMOKING SUPPLIES AND EQUIPMENT" and then choose your smoker.
We usually try to keep our temperature between 100°C-120°C for beef, pork and lamb, for chicken it is 150°C-160°C, chicken does not benefit from low temperature and cooking at higher temperatures keeps it from drying out and crisps (croquant) up the skin.
Wow! You had some temperature fluctuations (217°F-437°F), in your photo, the middle one, there is a chrome disc with holes in it on the end of the firebox, that is how we regulate temperature, by opening or closing it we are allowing more or less air into the fire, try starting out your fire with all the doors closed (if this is wrong for this type of smoker can someone correct me) and the disc fully opened as the temperature rises, when it reaches 85°C-90°C start by closing the disc by 25%, wait about 15 minutes and see what the thermometer is reading and continue regulating the amount of air entering into the fire box until is rests between 100°C-120°C.
After you have the fire stabilized, if or when the temperature starts to descend then add more wood instead of opening the air intake (disc).
Autre chose, most of the factory thermometers are not accurate, if you can remove it you might want to check its' accuracy first in boiling water, it should read 100°C and then in a glass of ice water, it should read 0°C, most of us replace the factory thermometer with a quality BBQ thermometer.
I hope that helps, if I have confused you or you don't understand, just tell me here or send me a PM and I will explain in French.
Gene