/u/HeftyCryptographer21 will be interested in this question.
Mutual respect between front and back rider is paramount. Not using overly specific terms, like captain for the rider and stoker for the back rider, can help. You must both fully accept that your partner is giving of their best even if it doesn't meet your needs or expectations.
You will get the old jokes by bystanders of "she's not pedalling at the back". Equally, as you pant uphill, you will wonder what the oncoming driver is laughing at only to turn round and find your back rider sat up taking a phone call from a sibling on another continent. Just take this in your stride.
You'll know you are a good team when you've worked together to get up something like the
$1 in Yorkshire, and then made the steep descent back to the village and café.
A good front rider will make sure the back rider is kept safe and informed. Changing gear, changing direction, changing surfaces, all can cause consternation and surprise, especially to a VI back rider. Most importantly, the front rider must call out for potholes and other bumps in the road. The back rider will get a hard shock through the saddle if they are not warned in time to put their weight onto the pedals.
The front rider also must be a competent cyclist, they have to steer, brake and change gears on a bike that is bigger, heavier and longer than a solo and has another person on board. There are some tandem specific skills, mainly getting on, setting off, stopping and dismounting, and changing gears. Changing gears requires more anticipation and some coordination with the back rider.
A good back rider is calm, patient and forgiving, ready to push the pedals when the hills come and ready to hold on tight for the fast descents. I'm always grateful for how calm my back rider stays when things get uncomfortable because the route I've chosen is really too rough and rugged for a tandem, or I've misjudged the slalom between gates and had to brake suddenly. I will get told off in a gentle way but they wait until I've dealt with the crisis.
Where the back rider is VI, the front rider has another set of responsibilities, starting with Audio Description of the world as it goes past. Part of the fun of travelling with someone is that you get to share experiences and converse as you go. Describing the surroundings helps both of you to share the experience. VI riders, the same as sighted riders, will get a lot from the purely physical sensations of cycling, the wind, the sun, the hard climbs and fast descents, but if the front rider forgets to talk the back rider can feel left out of the experience. Off the bike, the back rider is still visually impaired but is no longer in the cocoon of the tandem where they can pedal as fast and hard as they can without tripping or snagging or colliding with things. The front rider is now the guide, at the least describing the route to the café toilets so that your white cane can guide you to them, or assisting with the other little reasonable adjustments such as reading the menu if braille or large print are unavailable.
Finally, someone must own a tandem, be it the front rider, back rider or a club. Tandems are expensive, usually more than twice as expensive as two solo bikes of similar quality, and good dealers are few and far between. If you can find a club that caters for VI riders that will be the best place to start, otherwise there might be a local enthusiast who is just looking for someone to go out on a tandem with them.
Good luck finding your ideal tandem partner, or at least one who is good enough.