Agree with what's been said in regards to the practise element. It's always tough to spin a pass out off your weaker hand, but try your best to emulate the technique shown off your left. Again, practise, practise, practise.
practice, practice, practice and when you're done practicing, practice some more. also, try brushing your teeth with your less dominant hand so you get accustomed to using it. another thing that u can do to get good at passing with your weaker hand is throwing a rugby ball really high up into the air above you and catching it. not only does this improve your catching, but it also improves your spin passing if you don't have a partner to do it with. as you throw it up, spin the ball off either hand. rugby is a game that rewards people who train hard so make sure you have a good work ethic and don't forget to enjoy it :)
There is literally no advice for this other than practice mate.
Just work on it you don't need to spin pass it just flick our wrist
