Welcome to BladeForums.
I hope some of the guys didn't put you off. These are really a great group of well meaning guys that would give you the shirt off their back. It is hard to be a knife nut without becoming a bit of a steel snob too, they're not picking on your or your knive choice, thought it does kind of sound like it. Inexpensive knives that are weapons/toys have given serious knives a bad name in the general public, and aren't too popular here. But there is nothing wrong with buying what you enjoy.
If your interest in knives develops and once you use them much, you might start looking for harder stronger steel and more useful blade shapes, but if you're like me, you'll still look back to your first knives with fond nostalgia.
Softer steels like lawn mower blades, sickles, and certain knives respond well to a file. I think you will likely have good success with a moderately sized fine file, such as a 10" flat smooth cut file. It works quickly, requires no oil or water, and leaves a micro serrated edge that slices well, even if it is not highly acute or sharp.
If you become interested in using blades made of higher carbon steel at higher hardness, you'll want a proper sharpening setup, as has already been recommended, but they're a little more pricy, and a file is a good tool to have around anyway.