If you need to ask online for information on basic firearm stuff, you are likely not ready to own one. I only say this because judging by your post you don't know a whole lot about them. I do not mean this as a flame or negative post in any way, but PLEASE, please, please educate yourself as much as possible on firearms before you buy. It is not a toy, it can end a life instantly.
Read online about your local laws, calibers, makes, models, general safety and maintenance, THEN come back here with some back round on the subject. I feel this is a better way to go, both for safety and for finding a gun you will really enjoy.
Again, this is not a flame, I just don't the idea of un-educated people owning firearms.
Look up information on local firearm forums, they have a wealth of information on both safety and different makes/models.
"Conformities are called for much more eagerly today than yesterday... skeptics, liberals, individuals with a taste for private life and their own inner standards of behavior, are objects of fear and derision and targets of persecution for either side... in the great ideological wars of our time."- Isaiah Berlin
"Freedom is not something that can be given. Freedom is something people take, and people are as free as they want to be."- James Baldwin