It's not that hard really (though I wouldn't start off with elapids), common sense goes a long way.
A few pointers:
Never open the enclosure before you've located all snakes.
Never go within striking distance of the snake, use the full length of the hook at all times.
Don't get too comfortable, even though your snake never showed any aggression towards you it doesn't mean it never will, they're treacherous like that.
Treat all venomous snakes like if they could kill you, even if they have a mild venom.
Keep a good lock on the tank, no improvised duct tape contraptions.
Never open the tank while intoxicated ( should go without saying
And of course, don't get bit!
When you're ready I would recommend you to start with a smaller arboreal viper, mostly cause they're easy to handle, most of the time they'll just grab on to the hook and stay there. Also they're not likely to hide amongst the leaf litter and "ambush" you.