Prudent caution about snakes is good. I just today moved two small (<1m) but quite venomous snakes from my pool shed out into the bush, very carefully. But a reaction as extreme as yours may not serve you well in an encounter, it's best and safest to stay calm. Personally I was quite arachnophobic growing up, but have found that 20+ years living in Australia and the normalisation of removing the odd big huntsman from the house has made it so they don't bother me now. I believe this also helps me be more confident in other areas too. Like they say, beyond fear is freedom. Maybe have a look around for groups, hypno etc? All the best.