Following on with Petronski’s very appropriate suggestion that you crack a book, let me suggest that if you really want to understand something about our Constitution and our federal form of government (formed just as you suggest to protect our God-given liberties), and to understand something of the concerns and intentions of the Founders as they struggled to craft a form of government that might actually achieve that goal in the real world, start with The Federalist Papers, by Alexander Hamilton, James Madison, and John Jay.
Take a chance, educate yourself.
"We, therefore, the Representatives of the united States of America, in General Congress, Assembled, appealing to the Supreme Judge of the world for the rectitude of our intentions, do, in the Name, and by Authority of the good People of these Colonies, solemnly publish and declare, That these united Colonies are, and of Right ought to be Free and Independent States..." - The unanimous Declaration of the thirteen united States of America
The truth of the matter is that the Founding Fathers did not consider the federal government to be a "national" government because the United States is not a "nation" in the strict sense, but rather, a federation of independent nation-states. The ratification of the Constitution didn't change that either. In fact, The United States is still a confederation.
"The definition of a Confederate Republic seems simply to be, an "assemblage of societies" or an association of two or more States into one State. The extent, modifications and objects of the Foederal authority are mere matters of discretion. So long as the separate organisation of the members be not abolished, so long as it exists by a constitutional necessity for local purposes, though it should be in perfect subordination to the general authority of the Union, it would still be, in fact and in theory, an association of States, or a confederacy." - Federalist, no. 9