I picked up my first set of smallpipes in August last year so am still very much a novice in the way of the bellows. However I have been playing GHB for 35 years so can echo the comments above to the effect that concentrating on technique and patience are very useful in fact I think essential. I found also that one of the best decisions I made was to have a drone switch put on the pipes. With the drones off it was easy to listen to the tone quality of the chanter and realise how shockingly poor my pressure control was whenever I tried to play a tune. So no tunes until I could at least hold a good quality and true octave when playing a scale. Then playing only slow airs and simple piobaireachd grounds to work on improving quality of pressure regulation. Next stay on these - especially tunes with lots of long Cs - but with drones on. I found the Cs a great way to check blowing and tuning are OK by getting the rich chord against the drones.
Also it took a while for the penny to drop that these are NOT GHBs - for example the acoustics of the chanter are different, and hence even for playing GHB standards it may be better to apply some different ornaments eg replace some birls with other emphases. And I found it helped to take more time on the grips, throw and taorluaths - giving the chanter a chance to respond, not trying to rip through the movements. I also found that I had to make some effort to get clean birls on the smallpipe chanter - different finger spacing of course on the low hand. So for a while it was back to birl exercises with them (which mean my birl on the GHB is now pretty damn good).