No Q is stupid. Everyone starts from somewhere.
To carbonate your good beer, there are 2 ways about it.
First is the force carbonation. It is literally forcing carbon dioxide (CO2) into the beer and we can do that in a keg or the mini keg that you appear to be using. Simply ramp up the CO2 pressure in the keg and after a few days your nice beer will be carbonated.
Second is the so called natural carbonation. After fermentation is complete and during the transfer into the bottles or kegs, priming sugar is added so that the yeast can ferment them in the bottle. Since the CO2 produced cannot escape, the beer eventually becomes carbonated. Amount of sugar to add is important. Too much and you get gushing bottles when you open and at worst, bottles can explode. Too little and the beer gets flat.