Young man, don't be afraid to jump in and rebuild the carb. All of us on this board had to learn how to do this stuff. As you learn different procedures, your confidence will build and you'll tackle tougher stuff.
The first thing you'll want to do ----FOR SURE----is to buy an original factory service manual. Most aftermarket manuals are junk, so buy only the original factory publication. It will show you step by step how to rebuild the carburetor and adjust it for best performance.
1972 Buick Repair Shop Manual Original GS/Skylark/Riviera/LeSabre