Spinning or baitcasting: this is the real decision
If you are buying your first real setup, buy spinning. Not because baitcasting is worse — it is better at several specific jobs — but because a baitcaster punishes a bad thumb with a backlash, and a backlash on your third cast of the day is how people stop fishing. Spinning gear has no equivalent failure mode.
Baitcasting earns its place when you are throwing heavier lures, fishing heavier line into cover, or want more control over where a lure lands. A baitcaster with a 6.8:1 gear ratio picking up 28 inches a turn recovers line far faster than a 5.2:1 spinning reel picking up 25 inches — and that matters when you are working a squarebill back to the boat all day.
How to read a combo's numbers
Rod power is how much force it takes to bend the blank; action is where along the blank it bends. Medium power with a fast action — bends near the tip, stiff through the middle — is the most useful single combination in freshwater, which is why nearly every beginner combo is sold that way.
Line rating on the rod is the honest constraint. A rod rated 6–15 lb spooled with 30 lb braid can be broken by the angler, because the line no longer gives before the blank does. Lure rating matters just as much for casting: a rod rated 1/4–5/8 oz will not load properly with a 1/16 oz jig, and your casts will be short and clumsy no matter how good your technique is.
Gear ratio is often quoted as though higher is better. It is not; it is a trade. A high ratio recovers line quickly and gives up torque. A 5.2:1 reel is a fine, even preferable, choice for a beginner because it is harder to fish a moving bait too fast with it.
Max drag is the number most worth checking and least often published. Where a maker does publish it — the GX2 combo range runs from 6 lb on the smallest size to 15 lb on the largest — it tells you the honest ceiling of what the outfit can fight. For freshwater, anything above about 10 lb is more than enough; you will loosen the drag well below the maximum anyway.
Two-piece rods are not a compromise
A two-piece rod fits in a car without threading it through the cabin, and on a modern blank the ferrule costs you very little. If you drive to your fishing, buy the two-piece. The exception is if you are chasing maximum sensitivity for finesse work, where a one-piece blank still has a small, real edge.