The following is a list of genera of the most commonly collected venomous snakes in the private owner community. Knowing at least one species from each genus will help you identify the different species that you encounter among private keepers. I encourage you to focus on learning genera and not species because you will cover a lot more ground than learning all the species of one genus.
Agkistrodon
Aspidelaps
Atheris
Bitis
Boiga
Bothriechis
Bothrops
Cerastes
Crotalus
Dendroaspis
Echis
Ophiophagus
Ovophis
Oxyuranus
Protobothrops
Sistrurus
Trimeresurus
Vipera
The only journey is the one within. – Rainer Maria Rilke