TandemGeek

Assuming you and your stoker are of average size, you're technique will improve over time: just stick with it and take it all in stride.

Right now you're both learning to work as a team and probably doing a few things that are working against that goal, i.e., does your stoker still look around you or move about as you approach your stops? As your stoker's confidence grows -- and that'll just take time and good behavior on your part -- they tend to relax more and learn to move with the ebbs and flow of the tandem. As that happens everything will get easier and seem more intuitive.

Finally, not to burst your bubble, but many of us who have been riding tandems a long time still find we lean the tandem to one side just a bit. However, as teams we compensate for it in other ways, e.g., stoker sitting just a bit off-camber to center their weight. Moreover, all of this can become even a bit more challenging as you head off into unusual terrain where you'll need to adapt your technique for uneven steeply crowned roads, downhill or uphill starts and stops, and perhaps even some off-camber roads where you'll find you need to put down the foot that usually stays in the pedal.