One thing to keep in mind is to keep slow, smooth movements, nothing sudden. A buddy of mine struggled with the downshifting and engine braking when he first started, we spent several nights in a parking lot just going up and down through the gears for him to get adjusted to the rpms and using the clutch. To the stalling in traffic, just try to keep a cool mind and not get frustrated. And, of course ride, ride, and ride some more. Best of luck to you!