The advantage to a kit is it includes a lot of stuff. You'll have a big selection of sensors and parts to choose from.
The disadvantage to a kit is it includes a lot of stuff. You'll have bought and paid for a big selection of sensors and parts, some of which you may never use.
Since you linked to Amazon, I assume you are someplace where shopping on line is convenient. In that case I'd start with a small handful parts and let your developing skills and interests guide your future purchases.
A bag of LEDs with resistors included is really basic - start there. I make up a dozen or so of them with a resistor permanently soldered to the cathode (ground) side of the LED (it doesn't matter which side you choose, just be consistent for your own sanity later on!) These are quicker to wire up on a breadboard than using separate LEDs and resistors, and they make a quick and dirty logic-probe ("Is there 5v on this board?", "Is this pin HIGH or LOW?") or output device.
A handful of push-buttons, often called "Tact switches", a few analog thermo sensors (LM34 or LM35 f/ex), and a light sensor, would start you off inexpensively while providing you opportunities to learn how connect these devices, some basic electronic theory, and some programming skills.
By then, you'll have a much better idea what kinds of projects you want to pursue and the parts necessary to build them.