I agree both with the nonvenomous thought, as well as the no really good starter venomous part. I grew up here at my house in Arkansas catching all sorts of colubrids. Mostly these consisted of black racers and prairie kingsnakes. I got a lot of experience in handling very high strung specimens of both species. Those of you who haven't dealt with aggro prairie kings, you don't know what you're missing
I am a firm believer that my childhood played a key role in helping me to develop the handling skills I have now. By no means am I just an awesome handler, but I've yet to have a situation that really just tested my abilities. I see a lot of similarities between racers and the faster terrestrial elapids, but really, they are pretty asimilar to most cobra species. I'd be more inclined to say they are more like small taipans or mambas than a kaouthia or something. All the kaouthia and naja (the species) I've dealt with have been relatively slow moving compared to a very high speed snake like a racer. I would have to say that, in my opinion, w.c. cribos are pretty good trainer snakes for most Naja's husbandry (because of the size potential, body build, and tendency to be snappy), and a nice big false water cobra would be a good any snake trainer on learning how to stay out of the way of a wild feeding responce. Some of the smaller, nasty-tempered terrestrial boids are comparable to smaller viperids, such as the aptly name viper boas. Most of them will not hesitate to land a bite on you, and if you've ever been tagged by one, you'll quickly realize that hot or not, you don't want to repeat the procedure!
All that being said, of course there are no nonvenomous that can completely prepare a person for keeping the real thing. If you can find someone willing to help you in your area, that's a great thing. If not, just use a little common sense. Most of us can do this to some degree at least. Sit down and take a realistic look at the snakes you want to keep. Talk to people who keep them and see what they say about them. Try your damndest to see them in person, being handled preferably, before you decide. Then, after all that, if you are ready for whatever and know for sure that you are capable of handling it, I don't see a problem with going with that snake. Disclaimer: consider my talk about common sense up there; a common sensical step is not to go from not keeping anything to suddenly keeping mambas. Just have fun with whatever you do, be completely careful, and be prepared for whatever consequences may befall you.
-Chance
River Valley Snakes