Agree with the warnings above. Even "mild" hots are not to be taken lightly.
I have cared for a few hots in an institutional setting. Copperheads were definitely the most laid back BUT this may lead you to become too careless when dealing with them. I know a guy who was nailed by a copperhead for this reason. Copperhead bites are relatively mild (you probably won't die) but still pretty nasty. There is an antivenin that works for copperheads, cottonmouths, and at least some rattlesnakes that is reasonably widely stocked in the US. Still, be sure to find out which hospitals in your area (if any) stock it. At least at the time I was dealing with hots, there was only one hospital in my entire state that stocked antivenin, and they only kept enough on hand to start treatment on one patient. Apparently the stuff is pricey and has a short shelf-life, so hospitals have a hard time justifying having it on hand unless they get a lot of snake bite cases. It is very unlikely that any of your local hospitals have antivenins for more exotic hots like cobras or kraits.
*EDIT*
I would also add- if you are really interested in venomous snakes, don't be discouraged by the difficulty of getting one. Volunteer at a local zoo, nature center, university, etc. where venomous snakes are kept. This way you can gain some valuable experience with less danger (since you'll have more experienced people with you).