Just get out there and paddle.
As a beginner, you have no idea what you actually want, and that's OK!
And with class III stuff as the most you are doing right now, you've got years of paddling to decide what your next boat will be.
And once you know what you want, 90% of the time its not what you have.
But that is ok, the used boat market will always be there.
Most of the "good" boaters on this site still want a different boat than the ones they have.
It's a grass is greener on the other side type of thing.
So stop worrying if you bought the right used boat, and get out there, beat that boat up, and paddle.