Nice one. Congratulations.
All airhead gearboxs are clunkers, more so than most. It does take very deliberate technique and can be a real annoyance if the rider expects something more slick. The heavier fly wheel models (ie yours) benefit from using the correct method.
Upshifting is a preload the lever with foot before clutch lever in and snicking into gear. The downshift benefits greatly from the blip. Selecting neutral when coming to a stop is easier with the wheels still turning too. Foot action on the lever should be firm.
It'd be worth going for a ride specifically to practice the technique.
Good clutch adjustment is very important and a semi synth also seems to help improve the feel (at least it does on my later 11/1981 bike)
Plan well ahead for braking!