Absolutely not recommended for beginners. Any constricting snake that grows over 8 foot long must be considered dangerous and should NOT be handled alone. This was not the fault of the snake, but rather the irresponsible actions of their owners Unlike mammals, snakes never stop growing altogether. After about 5 years a large snake will be close to it's maximum size, but will continue to grow for most of the rest of its life. In a safe, secure environment a healthy Boa Constrictor can live up to 30 years, what started off as a newborn snake that would easily fit into the palm of your hand could well be over 10 foot long and as thick a a mans upper thigh, eating 2-3 adult rabbits a week.
Most countries require licenses for the keeping of venomous snakes.
The keeping of venomous snakes is not recommended in the strongest possible terms. Apart from the likelihood of your being bitten yourself, should your snake escape and injure or kill an innocent third party not only will you be in deep trouble, the entire responsible snake keeping fraternity will suffer from the resulting bad publicity. It is worth pointing out at this stage that many experienced keepers with decades of experience will not become involved with venomous snakes. Should the desire to keep venomous snakes be extreme, it is suggested that you keep one of the nastier breeds of non-venomous for a year or two to get used to handling snake hooks etc. Because of the international nature of The Internet, and the regional variations in snakes, no advice can be given on how to recognise venomous snakes in the wild.