Well if you live in the DR...go to a gun store and LOOK. Spend hours looking and discussing the weapons to learn terminology before you buy anything.
DefensiveCarry Concealed Carry Forum is a resource you can use as well.. although based in the USA.
Once you know which type of waepon you think you want. Try to rent one and go shooting with an Instructor or knowledgeable representative from the store.
While guns are considered the original "point and click" device, it is not suggested you practice or otherwise try to learn on your own. Above all, have fun! Target shooting is a great sport!